Check to see if you have a 19 mm or 22mm nut before you go ahead with this; measure it against whatever the seller is offering. I don't think the question relates just to finding a strut mount that will fit -- there may be differing dimensions in terms of the actual strut.

I was going to buy the exact same setup from Trevor Ely a few weeks back for my '90 535iA with the intention of using the H&R springs over the BavAutos that I'd bought. Would've been great if it worked out, but even though I'm using struthousings (and mounts) from a 1991 525, the front struts still wouldn'tve fit. I think he mentioned that it came off of a 530...can't remember off the top of my head right now.

So, be sure to check the size of the nut. Good luck!