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In my humble opinion, after spending time with this bike, most of the stuff on the bike is pretty durable and built for function, not fashion. So anything that gets damaged (based on the type of people who own this bike) will either get fixed, or is damaged beyond repair.
Aside from folks parting out a TW, highly sought spare parts are gonna be far and few between, or super expensive.
Edit: in addition, people like me keep all the OEM parts taken off, so I can return the bike to as close to stock as possible, and hold on to any expensive upgrades that aren't specific to the TW. Or to just have spare parts.