well.... most parts are available, just not the darn 100 mm old forks for disc brakes, but I do have options for even that, the suntour suspension fork which should arrive shortly and even a German A kilo suspension fork would work... and as long as you dont need disc brakes we have regular forks and plenty of 74 mm wheels ...
meaning we can make something work.
we also have most everything else in repair parts available, so its not a problem in general , just with a couple bikes which are different ..

Now what you need for a speed TR ?