Level evaluation for adults

I’m taking on a group class at a company. It’ll be no problem to systematically evaluate their ability when it comes to conversational English.

However, as far as writing and listening skills go, I’m not so well-prepared. I could definitely come up with my own system, but time is short, I’m over-worked, and I just don’t feel like doing it.

I saw a level-placement test put out by Oxford which looks pretty thorough, but it’s expensive as all f… 2700, and I think that’s not including the tape for the listening section.

Does anyone know of a cheaper and not-so-bad placement system that’s readily available here?

Please don’t offer advice on some ad-hoc method. If I wanted that, I could do it myself.