I don't have the dimensions, but I do know the same exact fin unit molded in different colors was used on the Challenger-1 and the Star Wars Proton Torpedo. If you can find those dimensions they are interchangeable.

__________________
When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, and HAVOC !