I can remember seeing a video on YouTube years back of a woman in a nurse uniform getting covered in orange gunge.

I haven't seen it for years and can't seem to find it again on YouTube but looking back, it looked like a producer's scene.

Anyone got any ideas on where I can buy or view it?

Hospital blue nurse's uniform tunic, white tracksuit trousers? If so it's a very early Messyworld scene with a model called Jasmin.

Sounds like it could be a Wammonkey video - he did a series with his model, Lisa, I think, in various costumes, mainly just sitting on a chair and getting gunge poured on her. There was definitely one in a PVC nurse outfit (I don't own it - I think it was before I could purchase stuff easily online!) They all disappeared from the scene when he did quite a while ago, but I've seen the odd one surface on tube sites in years since.