I was wondering if anyone here has seen any aftermarket extended safetys for the Mossberg 590A1?

I am putting the Knoxx Spec Ops compstock on mine for multigun because I wanted to smooth the transition from my AR to the Shotgun, and also for the added recoil reduction. However, with the location of the safety on the 590A1, I would have to move my my grip position to disengage the safety at the beginning of a stage.

I've seen the safety that comes with the CAV ARMS AR type stock, and what I'm looking for is something similar, or better, but I don't want to have to buy the complete stock to get it, since I really prefer the Knoxx.