Re: Price of the ballscrew??

Try www.mcmaster.com
Scroll down to Power Transmission and look for Ball screws. They
sell the screws by the inch and also have the prices marked so you
can get an idea of how much your willing to spend and what you will
get for it. The ball nuts are resonably prices and you would be
able to purchase 2 to make an antibacklash nut. I buy alot of stuff
from them and I live in Australia and find them great to deal with.
I think it is one of the best sites on the net for browsing.
Hope this helps.
Richard.