Judy, since it's a White machine, maybe you could get a set of White irons and there would be no repair needed. I'm in Texas, so things might not be the same where you are, but you can buy lots of irons that have been made into tables on Craigslist.org pretty cheap.
That said, I know nothing about treadle sewing machines, so I don't know how common the White irons are.
bkay