Sorry for the late reply,
re: price on the GHL, best I found is Velocity Factor on EBAY.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7981343159&category=38634&sspagename=WDVW
http://www.velocityfactor.net/scripts/default.asp
Just got it today and can't wait. Hope this helps.
Almost was going to be your Gineau Pig on the Supersprint as there is a dealer here, but last minute decided no to Supersprint due to vids from a Mini Cooper and a BMW M3 with one on and sounded a little too close to rice rocket to me. GHL sounded meaner and this is what I wanted. IMHO.