I started an archiving project using a Mac Quadra 610 here:

https://68kmla.org/forums/index.php?/topic/25007-starting-archiving-project-using-quadra-610/

However, the 50 MHz NewerTech Quadra Overdrive proved to be not all that stable. The rest of the machine is 100% stable running at 25 MHz without the Quadra Overdrive, and I'd like to fix that.

Does anyone know of a source or sources of the last mask .57 micron L88M Freescale / Motorola chips, aside from the $50 ones on eBay?