PTC is offering a free 15 day trial of their EFX (expert framework extension) module for Pro/Engineer. I am trying it out right now and it does OK for automatically building framework with 80/20. They don't have metric sizes yet, and their selection doesn't include the whole 80/20 catalog. But they have Bosch and ITEM catalogs modeled up too. If you're interested, you can try it at:
http://www.ptc.com/appserver/wcms/fo...&icg_dbkey=482