Zeoncomp- I purchased my linear rails from Superior Bearing. I wanted the size 30 for the x axis so i had to wait about 6 weeks for them to be shipped on a slow boat from Tiawan. This was the cheapest that I found.
Send Rick Hoback an E-mail, and he will get back to you. He is good to work with, and he does what he says he is to do.
His e-mail is
If you have any question, let me know. There is a link under the project logs for my plasma cutter. I think it this is the link
http://www.cnczone.com/forums/showthread.php?t=33773 (My cnc table)