My 1977 2200tc came with a very nice little clarion unit in it. I reckon it is an orign as the front mounting plate was a 1st class fit for the dash.
I recently aquired a 74 V8 which had a Philips unit that appeared to be fiited by a chimp, it had tape deck and pre select but was a bit out of place. I have now fitted a Radio mobile radio cassette which looks good, just the right amount of silver.
My 2200 tc now has a modern panasonic with 6 cd changer, I have a blanking plate for period looks for shows but then I have an ariel fitted so get rumbled.
Look on ebay for a radio mobile or a motorola, there is plenty about so don't pay to much, even if you buy a untested one if you like how it looks then you can fix or buy one that is definatley working.
My Radiomobile was 99p and £2.5 postage and it works which was a bonus. I got the tape deck as you can get the thingy that works with personal cd players.
Colin