Yeah thats a av-8b quadrant, I think the last picture is a older type(Mk.3 I reckon)
As far as the stick, all the pictures I seen of U.S. versions have a stick similar as the f-15. So a suncom stick would do the job
British harriers however have another type(don't know the type or such). A couple of years ago
Mart Aviation Ltd. had a lot of old RAF sticks for sale. It seems that they don't have any right now, but you could ask them maybe