Oh. Can I use Gemini front ball joints? They cant be THAT different....

Hey Everyone. I just picked up an 86 Piazza from my local wreckers. Not in bad nick, a little rust round the back window, and my drivers side balljoint is F'd. Just wondering if anyone has an ok-ish one handy, just so i can move it around till i can get a new one. Oh, and WHERE can I get a new one? ...