Alternatives to the Volvo filters:
OILFILTER VP nr. 3840525: Mann W68-3/W67-2, AMC SO-801, Fram PH2951, Fram PH10411.
DIESELFILTER vp nr. 861477: Mann WK 811/86, Fleetguard FF5114, Fram P4178.
In The Netherlands the prices of the alternatives are about 1/3 of the Volvo price.
I have the information from members of the Dutch Bavaria Sailing Club so use on your own risk.
The filters seem to be the same size for engine types MD2030, MD2040, D1-30, D2-40, D2-55 and D2-75