I just got a set of hummer 12-bolts that I am currently sandblasting. 3 of the 4 rims do not have the valve stems in them. These rims use the funny valve stems like the picture below. The odd balls do not use a round hole just a little slot. The only place I found them is a 'Hummer' store and they want $36 each! Thats stupid. Has anyone found a cheap (reasonable) source for these? Or should I just drill them out and use TR412 valve stems?