Volvo C30 1.6D fuel pump defect

Hello dear Volvo fans, this is my first post in the forum, so please don’t be too strict on me. With my C30 1.6D the fuel pump seems to be defective in the tank. The replacement at the dealer should cost a whole 800€, which is unfortunately too much for me for such a small pump, especially since the car is already an accident car and has 220000 kilometers on the clock. So I have to make the exchange now, which should not be a problem for me either, also helps me now to my problem, the original pump is supposed to cost 400€ and I find it nowhere in the net… If someone knows about it and knows perhaps more similar or cheaper alternatives, because 400€ are not inside with me at the moment, besides the price seems to me to be exaggerated. Greetings from Hessen.