anyone know where I can get a front (prop) oil seal for my MK11 escort diff mines leaking cheers

ebay

You should be able to pop the seal out, take it to a "bearing factors" and get a match.
I have done this several times with my local "York bearing services".

Just dont expect it to be easy! It took me nearly 2 days to get the seal out. It was absolutely locked in place! Oh and be super careful about counting exactly how mnay turns it takes to take the nut off, as this need to go back on precisely as it came off.

^^ wot he is referring to is setting the preload for the diff - there is a crush tube - a tube with a bulge in centre - inside the diff that becomes shorter as you do up the bolt.

you do up the bolt until, with a spring balanvce atteched, you get the correct resistance.

the correct running torque is 25-27 kg/cm

I took my tube and hammered on the ends to thin them out whcih in the process would make the tube longer - reasoning being that to crush that metal would take a fair amount of torque ... and saved me 15 too - burton power sell the tube.

I seem to remember that the torque needed was hooooge, well over 100 lb/ft I'd say - and I had to use a substatantial angle iron bolted on to prevent the flange from turning - a lesser piece of dexion bent!!

I am not sure if my diff was set up properly since the drive flange was on loose - I had take the lot apart to fit in new gasket.