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It shouldn’t be bajillions, they just pull out and new ones clip back in. Well, at least that’s what it was like when I did the same on one of my old cars. Then again, it was a Range Rover and I think it was a few hundred quid but a washer’s a hundred quid for them! lol
Search online for parts salvage companies, especially on eBay. Just an example of cost to expect, between £15-£40.