Here is one $50...I'm sure they will be cheaper soon.
http://cgi.ebay.com/ebaymotors/ws/eB...sPageName=WDVW
It's probably not legit, but when manufactures what to charge over $200 for a CD version, then the gates will open...
I got one like this for my GL1800...$10 It is a copy of the factory one I think, but much cheaper for all I'm going to use it for.