GHawsJR

I picked up one of these a while back but havn't used it yet. Don't know how well it works but it's pretty small and mine came with the crystal of my choice as well:

http://cgi.ebay.com/ws/eBayISAPI.dll...99&refid=store


I'm sure you can find it cheaper though. This was just the first pic I found on a quick search.