i just picked up a older peavey bass cab , one speakers gone and the others there (its a 2x12)

i am gonna take it apart tomorrow and find out what kind of speakers are in there , is there a place that sells speakers for replacement ? , i also need a new bass head (not buying till i fix the speakers)cause the cab didnt come with one but for 50 bucks i dont care

i'll get up info and images as best i can the little card on the back is to far gone to read