Well IMHO the easiest way to make a thermo holder is to buy a 3/8 x 1 stainless nut and bolt and drill a hole in the bolt. It holds the thermo nice and level and I think it cost me $1.10.
Drumhead - UDS x 2 & UDG
Keep on Smokin'
KC native missin' KC
IMBAS Certified MOINK Baller 2009
I also support PETA - People Eating Tasty Animals