You're both right, yes.
I don't know the actual builder either; I had misunderstood that the seller actually built it but it seems not.
The site didn't mention Don Rawson, but it did say it had Drawson Engineering transmission, so I suppose that's the same thing.
Neither of you mentioned what the car is described as but the caption on Serra's picture does say it, so I can hardly ask for it!
I'm in 2 minds whether to give serra the point as his picture gives the answer, but on the other hand I think it's fair when someone has most of the answer to give them the opportunity to dig further for the point, but nicanary didn't get the chance.
So on this occasion I'll give both a point, but I won't always do that!
Another picture: