S939:
A64D 512 kB: Winchester
A64E 512 kB: Venice
A64E 1024 kB: San Diego
S754:
low power Mobile A64D 512 kB: Oakville (Probably a S754 Winchester, though I've never seen any good overclocks)
T64 512/1024 kB: Successor to Oakville (Special mobile core, not the best overclockers. Don't know the codename for Turion core, is it Lancaster? Just guessing...)
Mobile A64E 1024 kB: Newark (These are the closest to San Diego you can get on S754 AFAIK. Very new on the market, showed up shortly after T64 but I still haven't seen them i any retail store)
Since you're from Poland you could probably find a CPU in Germany or Denmark, like
www.itbutikken.dk or
www.shg.dk