Gone to put the sump back on and I dont recall taking dowels off and I have none I can see in the vast mass of parts from a total rebuild. Did you sump have dowels ? If so they do not feature on any of the parts websites.
Some have got 'em, some haven't. Heard that TVR used to shove the sump back a bit to avoid scavenge pump chain rattle :O I made some new dowels and made a proper chain tensioner