Hi Derek
I'm going to say No mate, I too had that shape fitted to my Gen 1 bike but I had to butcher the rear seat to do it, it's not ideal mate.
The one you need doesn't have the wavey shape back end and has a straight back end. I can see why you thought it may fit....don't buy it mate and hang on for the right one.
I had to buy the correct one when the chain snapped and shot up through the underside of the bike and launched it into orbit lol.
Expect to pay between 90 and 140 quid for the correct second hand one though.