wreckers would be your best bet.
<off topic>
A neighbour near my folks came over to have a chat (sticky beak more like it) when I was working on my timingbelt+WP he had broken his but still had the top part. wanted to know where to get one, but I have a range of bolts/nuts ect. so I dropped a suitable bolt through the top and nut from the bottom then used electrical tape to make a taper around the bolt worked like a charm he said.
you'll see what I mean:
