Never been to York. But have been to many other smaller shows and there is always
a parts guy available. So I am going to go out on a limb and say that because of the size of the York show(I have heard), there will probably be some sort of parts guy there to provide you with what you need.
I would only say, be patient. I have had to wait to get parts before.
I order parts from jeff Kane out of Rochester.
and I can email a parts list to Joe Scillia near Fishkill NY. He brings parts
to the Syracuse NY show 1rst weekend in November.