I don't think many places do them anymore.
To be honest there is no point in just doing cpl groundschool. The course cost will be almost identical and you are then limited to just a CPL, dont think you can get an IR with out the atpl exams, I may be wrong.
I asked about this a while ago as I was thinking of becoming a career instructor.
Just do the atpl's your not losing anything by doing them and you are keeping your options open.
My 2 pence
Nick