Tony's (TAB) covers are pretty much the only option I would trust. But I also agree with CAR and they should be used sparingly because they will hold that heat in. Also, when I went to the practical match I couldn't use my can because the shot timer wouldn't pick it up consistently. You just need to have good discipline and watch out for it.
I run into that with the 9mm. If I warn whoever is running the timer they have been able to make things work out. The more that I've thought about this the more I think that good discipline is really the only prudent course of action. My big concern is that it won't take much of a lapse to burn the $%@! out of myself. lol... Seems like someone warned me about that already too. I'm sure that I'll figure something out. Thanks again for all of the help.