So the N900 gripper still looks to still be available from game gripper.
It seems it is still offered but is on eternal backorder. "Notify me when the stock has been refilled"
http://www.game-gripper.eu/buy_n900.aspx
Still even if is someday available again from game gripper, is there any interest in an open hackable 3D printable design being available? I had been playing Mario64 a while back but now the effort would mostly be for the community.
Also looking for cool upgrade ideas to implement. This is not aimed at making a pirate copy of the game gripper but rather to make something better and open/hackable.

How many TMO users do have access to a 3D printer and want to print N900 accessories?

in addition to this open gamepad you can print a replacement stylus
http://www.thingiverse.com/thing:21911
and two car mounts
http://www.thingiverse.com/thing:8062
http://www.thingiverse.com/thing:10079