Spoke with a gentleman from a rubber manufacturing company - he can make them once he has drawings or samples.
The gist of the conversation is that it's probably going to be somewhere in the neighborhood of $2,000 to create the tooling. And then some minimum order quantity of 100 to 200 pieces which is somewhere around ~30 trucks worth of mounts (A0 and A1 need 6, while A1R need 7) - each mount likely being in the $10 range. That works out to something like ~$4,000 order with each truck costing about $135 for a full set of mounts.
This is all back of the napkin estimating. Also haven't decided on a material but something that's similar shore hardness to stock but doesn't have an 8 year shelf life might be nice.
I think if we put out the word we can probably easily come up with 30 trucks worth of orders and make this happen. Heck I'm down for probably 3 sets myself just for future truck purchases and I'm guessing many members here will want more than one for similar plans. $135 for all the mounts is not bad - heck the military pays $80 for a set but they buy thousands and that's probably a negotiated price from a long time ago with the tooling already paid for.
Also future orders would be MUCH cheaper once the tooling is paid for on the initial batch.
I explained all this in a previous post, and came up with similar, but higher, ROM numbers. Now you're seeing why my bushings are priced the way they are, even without make much/"any" profit on them. Though I think your numbers are overly optimistic. There's really no way to cheat/shortcut this problem.
A couple things to question...
1.) Is your "$135 for a full set of mounts" based on $2000 creating molds for one bushing (e.g. top), or all (e.g. top and bottom)? By him asking you to buy 100-200 bushings, I suspect he's talking about making enough molds/cavities to cast several bushings at once (e.g. "several molds"). With labor and materials factored in, $2000 seems like an amount I would typically quote for maybe 2-4 cavities of a 2-piece mold to make one part. Good platinum-cure silicone molds only last a few dozen parts (~50?), if you are taking really good care of them and using good ("expensive") mold release - cheaper tin-cure molds, cheap/no release agent, and a more agressive casting schedule will shorten the life (12-20?).
2.) Another factor is that the flexible urethane rubbers take a long time to set (e.g. 48 hours). So you either need a bunch of molds, or it's going to take you months to make 100.
3.) The top cab bushing is ~11 floz, and the bottom is ~8 floz. The materials (e.g. rubber + dye + UV inhibitor + etc.) are around $0.75-1.00/floz these days (in container sizes reasonable to make this quantity), making "$10 range" unlikely, when you factor in labor and fees (e.g. shipping/pickup of materials) and consumables (e.g. gloves, mixing cups, stir sticks, shipping box, etc.). Material prices have gone way up the past couple years.
4.) There are no better materials (in this price range order-of-magnitude) with significantly different shelf lives. UV-stabilized polyurethane is about the best you can do.
5.) The military's numbers should not be used for any kind of comparison judgement. They most likely bought a $100,000 injection mold and make them in a completely different kind of way. They run on a $2M automated press, and create one part every 30 seconds. Their pricing model just isn't apples-to-apples... you want 100, which is how many they throw away just to do a test run on that press to make sure it's working.