Regarding the tires, I had the same experience with a longer wait time than Peder.
I'd try Lucas Tires. https://lucasclassictires.com/
For fender welting, try Restoration Supply. https://restorationstuff.com/
What size tires? I bought my last set of tires from Coker Tires. These were Goodyear 33x5 which is for a 23" rim. When I went to order them they were not in stock and I was told that they should be in stock in a month. It was a year before I finally got them.
What style of lug nuts are you looking for?
looking for fender welting and lug nuts best place for tires ?