Yes Michael, a window AC compressor would work too, but is kind of big for the application. I've found that mini-frig compressors are the handiest size for small dedicated P/V applications.
BTW most AC compressors are scroll type, with really good vacuum, compared to the common swashplate-piston refrigeration ones. Scrolls are the preferred kind for many DIY medium high vacuum uses, but still not as good as a two-stage vane pump - the workhorse of roughing,
Ed
