they wil probs need resleaving, these guys do stainless
http://www.powerbrakes.com.au/index.php/selectedContent/2000398759 , its expensive but probably cheaper than a new one from merc.
rebuilding them is a nice simple job, just be carefull when you pull the rubber boot back as the pins can ping out.
westfield are a good company, never used vk but their prices seem reasonable.
Cheers, Brian
