Still working on cleaning up the garage. Here's some links to a ground ballscrew and a couple of z-axis actuators.

http://cgi.ebay.com/ws/eBayISAPI.dll...STRK:MESELX:IT

http://cgi.ebay.com/ws/eBayISAPI.dll...STRK:MESELX:IT

http://cgi.ebay.com/ws/eBayISAPI.dll...STRK:MESELX:IT

Thanks for looking!