Outer Limits 4x4 Board

hey wizz kids iv developed an oil leak that at first and second glance seems to be coming from the top bolt of the vac pump, has anyone had a prob like this? its slowly getting worse but it is also good rust prevention under the ute till i fix it any clues would be helpfull!
4.2 turbo non intercooled if that helps.

can be vac pump seal (if its on alternator) you can 'speed sleeve' them.
gets messy under bonnet as you say and the oil can root the alt if left too long.

good luck