Thanks so much! Shows how little I know about electronics, probably should have paid more attention in physics II. So I found some 1N4004 diodes on ebay cheap, 12 for $1 shipped from the US.
12pcs 1N4004 rectifier diodes 1amp upgrade for 1n4001 | eBay
I'm sure that's cheaper than radio shack, plus I'm saving gas by not having to drive anywhere
Will these work? Sounds like they are basically 4 times stronger