dogkiller,
EBay item # 380323830756 for an EV 75902LV is the functional replacement for your original switch. See TB11-6115-741-24. The EV 75902LV fits the mounting holes and comes with all jumpers in place and all terminals numbered correctly. Works correctly. Comes with a knob that is different but stronger than what broke off yours.
One of my MEP-802a's came with the master switch missing and I had no luck finding a Krause & Naimer chr10-c57400. But the EV switch works perfectly.
Only minor problem is that the EV switch is a different shape and so you'll need to re-arrange a couple of the wires to reach the proper terminals, but they will all reach without any cutting/splicing.
Some advice -- you know these switches are slow moving items on eBay. In fact, I bought the only 2 that have been sold! The seller's asking price is very reasonable for a new switch, but it's not cheap. You might try a "Best Offer" at what you think will work for you.
I have also seen a few of the chr10-c57400 come up on GL as part of much larger lots. But the large lots always were too heavy, too far away, and too expensive for me.
Hope this helps,
Richard