How about IIS special edition condoms ?Glow in the dark(red emission nebula of course),starry night, the expanding universe

....the possibilities here are as infinite as the cosmos. These would be a "definitely buy" item.
Other serious suggestions:-
Extra warm IIS wool socks for those cold winter nights.
Eskies (insert the obvious pun)
12 volt battery power supply with full features(regulators,multiple outputs,battery checkers etc.)