Production of high-end accelerators like 060s have proven to be not a good investment for any hardware vendor (especially if it requires R&D and not just a reproduction of an old trusted design).
For example... reproduction of A4000/A2000 accelerators from GVP went at 445$-480$ (without memory) and the design existed! A "from-scratch" design for an A1200 version won't be near the money figure you imagined for sure
I think you can forget about any production of high-end accelerators for your classic A1200. Your best bet is either grab an ACA1230 while it lasts, or find Apollo 1260/Blizzard 1260 or BlizzardPPC accelerator from Amibay/Amiga forums/eBay.
Apart from that, I think that most people are just fine with the 030's while others that require more power, can find 060's at ok prices from time to time.
One other thing you can do is to just wait for the "FPGA-Arcade with the 060 daughterboard" or the "Natami".