I was told that Trek’s policy is to not keep a stock of previous year’s frames, swing arms etc for warranty replacements,
Aye. And that’s their problem, not their customers. If they want to save the cost of holding warranty replacement parts, that’s fine but they need to pay the extra cost that this will sometimes incur.
Replacement part for a red swingarm is a red swingarm. Colour is a part of the decision making process for many people. No company that offers bikes in different colours can claim otherwise tbh.
Thing is druid, structural parts on a car are not on show and vice versa.
Well 1), yes they are but also 2) why is that relevant?