That 'accessory is out there to be found, if you're diligent, or run in the right circles. The going rate for a used one is ~$500 and the cheapest I've seen them is $375.00.
The Corp was still using them in the ME and it's still got those cool and collectible factors going for it, as well.
Not on my 'Needs' list, but should I ever find one at a garage sale for a few measly bucks, I won't leave it there for the next guy.