omega b 2.5 td injection pump defective (search repairer)

Hello together, my 96er omega b 2.5 td (170 tkm) jumps in the warm condition very bad. vehicle was today at the bosch service and they have determined that the (I think it is called) quantity teller is defective. so send in the pump and repair or install an exchange pump. at the bosch service ca 2000 euro (with at Esp) then I found a bosch service that offers the same for 900 euro, about 300 km from me. ecotec here from the forum I have already written to…is from he’s still on vacation. does anyone else know who is doing this cheaply?! come from the country celle… doesn’t want to put a fortune in the car. mfg frank