What sorts of radios/sort of radio do you want to see? (Not sort of radios OR sorts of radio)
(Right Word Wrong Word by L. G. Alexander)
Right Word Wrong Word has been compiled with reference to the Longman Learners' Corpus and has been widely tested to ensure that common errors from all the major language groups are incorporated.
762 on "that sort of people".
687 on "those sort of people".<> [I'd avoid it