I have a 92 VR4 and the rear pinion seal starting leaking..

My mechanic is having trouble locating one quickly and is reluctant to tear it down before we find one..

Does anyone know where I can find one or know of a common type that is compatible?

Also, a few searches on the subject have me a little spooked.. could this be a symptom to another issue? It was running and driving fine with no weird noises when I noticed oil was leaking from the rear end.. I'm hoping it just dried out and started leaking..

Thanks in advance for input/advice!