BMW 328 !
for my case i got brand new Monroe Front Strut for (318,325,328) (i know there are the worst strut ever but anyway) a year ago they are never been installed ,
then i buy e36 M3 H&R race Spring and the Spring a bit too small
but maybe someone try it before !
i don't know a lot of thing about non-m to m3 conversion
but nice price bimmerpwr good luck with your sale
maybe this link will help you