You won't find one of these at the local hobby shop! http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=2585&item=5906883153&rd=1
If you are looking for 1:25 scale nailheads you only need to find a kit of Tommy Ivos showboat it comes with four beautiful injected nailheads nicely detailed and it seems that the kit is either currently in production or is re-released every couple years.