I make my own based on the Alembic Strat-O-Blaster circuit. The schematic is readily available in multiple places on-line. Costs me less than $10. For a little bit more money, there are two or three Blaster kits out there that are fairly easy to assemble if you have even moderate soldering skills.
Bill, tgo
First: 6/22/69 (Central Park)
Last: 6/4/95 (Shoreline)
https://reverb.com/shop/420guitars