Just a thought, might be worth buying a complete trf501 kit off ebay and break it up for spares, things like the body shell, wing, undertray, all the plastic parts, drive belts, wheels, pulleys, bearings, cvd's etc would be popular enough spares, and I'm sure people will need some of the carbon and aluminium bits. I doubt you'll have much of it left within a couple of weeks once the outdoor race season proper starts.
-Steve