There's also always the original Plinkers jig.
http://www.gunco.net/forums/f202/ak-riveters-38938/
This will do everything the AK builder jig will do for a whole lot less, apparently. $255 for the rivet jig, long rivet jig and trigger guard jig.
As always, there are ways to work around the cost... but the jigs make life a lot easier.
$10 bolt cutter from harbor freight and about 2-3 hrs of elbow grease. You can modify vise jaws for a trigger guard jig if you have a drill and some punches for next to nothing (if you already have the vise) just time involved. The barrel pin, 9 times out of 10 can be knocked out with a hammer, punch and a solid base. etc etc.
Even better if you can find somebody near you that already has all that stuff and can help out.