temp controller uds

Well here we go then First of all sorrie for my englich ill try to keep it so everyone can reed it (im actually dutch) Today was a good day to start my first smoker/UDS build And i started with the heart of the monster the charkole box i had these two stainless grills lying around been...

I'm thinking about asking Santa for a Temp Controller for my UDS and was wondering what models people are using. Do they make any that connect to the 3/4" nipples and without a lot of modifications? Who has the best price? I'm kind of thrifty so the most expensive is not an option for this...