There was someone selling DB9 bits from a car they are breaking on ebay recently. Might be worth a look to see if they are still have a listing and contact them as you might be able to buy just this piece from them (assuming you'd be happy with pre-used part).
Search back thru here or 6speed, it was discussed a couple or years back, aston bits used to sell both the genuine and the substitute part, I think it’s a jaguar but can’t swear to that.
