The seals in the FD are easy to replace, Four areas which could leak
1- the brake pivot which has two o-rings on it.
2- the front brake shoe pivot point, large pin which has the circlip on it. This is a press fit. The pin can be a loose loose fit. I order to replace you have to remove the FD cover, fairly easy to do. Mine leaked and I used a little bit of epoxy on the pin to fix. should take care of gthe leak. You might try permatex #2 on it too.
Remove outer bolts and insert two 8mm ( or 6mm) bolts and tighten to push cover off from housing.
3- gasket leak on final drive cover.
4- the ring gear final drive seal leak.