I'm impressed tha you have gotten hold of an iMac without disintegrated factory speakers tbh... that is worth it's weight in gold right there.

If you can find a junk 600MHz Snow or Graphite machine this will have the 750cx and the 16Mb graphics set also... still not quite the 700Mhz of the flower power but most of the way there, and at a guess probably easier to find than the last 700MHz iMac G3's.

I had a couple spare but I only know where one currently is (as it is a meter away lol). If I can find the others I had I will offer it to you for your endeavours for not a whole lot of coin.

Anyway, enjoy it regardless!