I suspect there are loads of copies on the market so go with a reputable firm.
https://www.cooksongold.com/category_select.jsp?channel=uk&query=foredom
If they don't have the one you want they could quite possibly source it.
I remember reading that a problem at the time of the Indian Mutiny was that beef fat and pork fat were used in the making of shells so offending both Muslims and Hindus.
I was serving a dozen or so newly qualified doctors in a bar one night (20 years ago) and commented that I was surprised most of them smoked. They said it was fine, it did no harm so long as you gave up by the time you were thirty.
Mine, done a few weeks ago was £414 (materials only). 11'6" x 8". That was all adhesives, trims etc. I did pay about £50 more for heavier rubber. Better to regret something you have done than something you haven't. Rubber4roofs. I'm 70, I don't do jobs that are likely to need redoing in my...
https://www.thepolishingshop.co.uk/
I ordered £45+ worth of belts, discs etc. yesterday and I've got them already. Excellent service and some very good prices as well, they deserve a plug.