Don Hoods have advertised for a few years in TRaction, the house magazine of the Triumph TR Register. I assume that they must be OK or the Register would have dropped their advert if members had complained. I saw one of their hoods on a TR today and it looked OK.
I think they normally leave it to the purchaser to attach the fixing studs to the hood so check this out if it would be a problem for you. As you are providing a template, they may do it for you. If you do place an order I would suggest you ask for your old hood back for comparison purposes.

Ken