20 pin mod chip

as the topic says, everywhere i go on the net, i can find 21 pin modchips, but am having trouble finding a 20 pin modchip. any suggestions?
it's pretty much impossible to find 20 pin mods by now, and if you do, it'll cost you more than a model 2 saturn with a 21 pin mod.
crap, i got a model 1 saturn and didn't find out until yesterday that there were 2 different modchips. Is there anyway to get a 21 pin modchip to work on a model 1 saturn?