1/4 Window handles

Mine won't hold the window out after bumped or with wind resistance on the highway.

Figured they where worn out. I see on e-bay someone is re-popping them but a little pricey. $70 a side.

Does anyone know this guys source or someone else cheaper?

http://cgi.ebay.com/ebaymotors/Parts...1%7C240%3A1318