I've heard from more than 1 repair shop(although not a Viking authorized shop),that it is difficult to get parts for Vikings. At least the older ones. I got mine in 1995 and when I needed a belt, it took a really long time. And then they sent the wrong one and I had to wait more. I just keep my fingers crossed that.
The reason I took my Viking to a non-Viking repair is because the Viking repair tech in my area was out of the country for a month. I can't even imagine how long I would have had to wait once he returned.