Wild West folk - Mongoose staff are, I trust, hella busy making games. But if you make it real easy for them, you might - maybe - get yourselves a cheat sheet.
The OGL Horror one is based on the one I use for my games. I sent it in to see if Mongoose wanted to use it. Sure enough, they prettied it up in the OGL Horror trade dress and set it on out for all to see and use.
All it takes to get the ball rolling is someone out there pulling a document together. Then - maybe, if they can squeeze it into their hectic production schedule - Mongoose will purty it up for y'all.