Years ago I acquired a stock in tank filter unit from John Bizal at Midwest Military... I never used it (it's on a shelf somewhere in the shop). Instead, I have a fine mesh brass screen over the end of a straight pickup tube in the tank. A very nice pair of spin on filters is mounted on the engine block next to the lift pump (did I mention that this is on the truck with the Cummins 4BT?) and I am installing the same setup on the pickup tube for the XM708 with the stock engine and fuel pump (and will put a spin on filter in line similar to Bill's).
Even with a tank that has been "tanked" and epoxy coated inside and out, you never know what might get inside and clog you up, and it's a lot easier to fix a clogged filter that isn't in the tank... And a little air pressure to backflush the line from the external filter back is all that is needed if you get something into the line past the screen (hasn't happened yet...).
Plus, it's a lot less expensive than the in-tank filter that was specified.