Hi mick what do you want to do with your 411 you can fit something like the Bf Goodrich tyre as the 411 weight is not massive as long as you go for a high load rating or any good tyre shop will sort you out just make sure they don’t sell you something with really stiff sidewalls, I did find a company in Germany that did a really nice looking tyre for the 411 I’ll see if I can find them.
Moose