There aren't too many of them left in captivity... Ian Thompson was a real innovator... and THIS is the boat that spawned a lot of changes in regards to freestyle and design I believe.  

http://www.cboats.net/util/fullsize.php?image_id=164
http://www.cboats.net/util/fullsize.php?image_id=165
http://www.cboats.net/util/fullsize.php?image_id=166
http://www.cboats.net/util/fullsize.php?image_id=167
http://www.cboats.net/util/fullsize.php?image_id=168

I'm fairly sure you can still get the Groove in composite.