Bought mine from eBay. A Dutch seller, brand new Hella "U28" pump badged as a Volvo part. It came with a diagram to wire in a relay to save the load on the brake light switch.
If no luck on the eBay site maybe try Google electric vacuum pump ? Hella do the U28 and U30 both should be suitable, other makes are available.
If no luck on the eBay site maybe try Google electric vacuum pump ? Hella do the U28 and U30 both should be suitable, other makes are available.