They come in color coded sizes...like the rivet sizes. figure out the rivets you want to use and get some clecos to fit. Use EBAY and you can save a bunch. Ft Worth and San Antonio have good aviation communities and you will find lots of good deals there.
"If it can't be reduced, reused, repaired, rebuilt, refurbished, refinished, resold, recycled or composted
then it should be restricted, redesigned or removed from production."