I replaced mine with a new VDO pump but I am struggling to think of a way to get the old one out if the captive bolt is no longer captive, beyond what ainarssems has suggested in putting some tension on it. Plan B would be a replacement tank from A8 Parts, salvage whatever you need from the pump housing by brute force from the old one, fit you new pump in there, but given the 'saddle' nature of the tank I can't imagine they are much fun to change
