It's all speculation until you get the condition report but there are a couple of places for spares, perhaps Knibbs & Protek are the ones that come to mind first. Your existing parts may provide a basis for repair or perhaps act as a source for dimensions should parts need to be made...?

Hopefully the creek won't turn out to be as deep or wide as you fear.

It will be interesting to see what they find as the cause of the problem, might even be repairable without too much trouble