I've bought some ballscrews from him for a CNC router and I'm about to get some more for converting my X2 mill.
His service is good. If he doesn;t have what you want advertised, just ask!

He also sells a range of water and air cooled spindles that seem pretty popular on cnczone and [ame="http://www.woodworkforums.com/forumdisplay.php?f=170"]over here[/ame].