Hi Damien, welcome aboard and thanks for sharing your rebuild. I love seeing pics like that, makes me want to clear the garage and make some space
Can't specifically help other than post some general information about the car which you probably know already.
Production was believed to be originally in 1976-7 by a company in Hereford (company name not known) Production of around 5. As you say later revived in the 1990's as the Triad by Malvern Autocraft, Worcs
(source - Classic Kit cars by Chris Reece)
Don't know anymore than that. Ferg maybe along as he is into the old stuff so may be able to help.
Keep up the good work,
cheers John