Try Bills Radiators in Plano. Its a hole in the wall but we use em for all our radiators and no problems so far.
Any machine shop will do it . If you have a pressure washer , just do it your self and get some LONG brushes to clean all the oil galleys out with . It really doesn't call that much at all ! Retro Jim
Garys Machine Shop 916 Lakeland Dr Mesquite, TX 75149 972-285-0182 try this guy,off of 635 hope this helps you out