Here's enough patches to keep you going for quite a while. Bet you can't get all of them on one tube. $1.89 postpaid. 48pcs x 25mm Round Rubber Patch For Bike Bicycle Tire Tyre Repair - US$1.89 This happens to be my favorite place for inexpensive bike tools. Takes about 14-17 days for things to arrive but the prices are right! The patches are first rate too.

I'm cheap but I usually give up after a few flats and install a new tube. Mail order tubes are only about $3.50.