I've got a 150mm Aprilia headlamp here which I don't need. It's the peaked type, and in good condition. I think it was used on narrowcases like 250 GT, Monza, Mach 1 - but I leave it to you to be sure.

Anyways, make me a small offer and it's your for that + the price of the postage. Let me know where you are, and I let you know how much it will be so there's no nasty shock.
Ciao
Craig