Cheapest way to do 5 lug swap? (With a side note)

[adam12hicks]

The side note is that I have a close friend who owns an Import Auto Salvage yard and gets nice e36 cars in literally every other week.  I can have anything I want pretty much free.

SO I'm wondering if I can just do hubs or need the entire strut assemblies, etc.

My main concern here is that I just spent a pretty penny on Bilstein strut / spring combo installed on my e30 so I'm afraid of doing a 5 lug swap that will make these useless.  Any way to get 5 lugs on this baby and still keep my suspension?

Thanks!