This is what Hasselblad says about parts for film cameras:

Spare parts for analogue camera products can be supplied for at least 10 years after production stops. Hasselblad will to the best of its ability supply spare parts for analogue camera products up to 20 years after production stops.

So at least to 2016, and maybe up to 2026. If you're concerned, why not contact Hasselblad and ask specifically about where things stand with the XPan?

Presumably parts can also be swapped from the Fuji TX cameras, though I doubt very much that Fuji itself would touch the Hasselblad-branded version.