You can replace the bar TP but I don't know how much they are and to be honest any bar would probably do. The casings are very nice though. - I paid £50, they are £140 new apparently.
Theres a link to the pictures in ukmoc for sale section TP or look here
http://www.ferracci.com/2002ferracci...s/clipons.html [Edited on 21-5-2005 by phoenix n max]