I did some lookin' too and the Olympic Rivit shavers are unique. The aircraft tools and rivit shavers that I ran into are all geared toward shaving flush rivits and not crowned rivits like the Olympics. I finally bought several "Micro stops" at the Boeing Surplus Store (3 for 12 bucks) and a carbide flush shaver bit from The Yard (
www.yardstrore.com) for about 15 bucks. You can also get the micro stops from the The Yard in the 20/25 buck range.
What this setup does is NOT the same as the $180 more or less Olympic Shaver that leaves a dome shape. What it DOES do at $40 is let you set the microstop so that you just knock off the center of the rivit so that the the "pull" blends with the rivit.
Get a Yard catalog to learn about less expensive flush shaving options. Get an Olympic shaver if you want the real thing.