Does anyone know where I can find either a grooved or checkered(I dont want a smoothe) mainspring housing with a GI style lanyard loop, like the one in this picture? I have been looking all over the place for one and all I can seem to find for a flat mainspring housing is either smoothe, or the modern style Lanyard loop(like Wilson offers), which Im sure works great, but Im more going for the aesthetics to make my R1 look more "GIish," and yes I know they were smoothe back in the day, but I am willing to compromise that for a slightly better purchase on the handgun. The only housings with checkers and loops I can find have the arched style housing, which I just am not a fan of at all. So, is there anyone out there who knows somewhere where I can find one? I have tried brownells midway and google with no luck. Thanks for any and all help.