There are some second hands pumps available at good prices that are 6-stage. I was thinking 3 on the RHS of sump, one at the rear and one off the head and obviosuly pressure.
I have read exactly what you have just mentioned about sucking in foamly oil, etc as there is not enough to scavange having so many stages. In between my previous post and what I have read since I do not think it is a good idea.
I do not actually think a 6-stage will fit, I think it will hit the engine mount which ever side you put it on. What you suggested is a good idea too, only thing is you are scavanging from higher up.
Cheers for that Ian, how many stages do you have on your VW?