If you want more information on reputable exporters from Japan, you should sign up at JDMVIP.com. They're not big euro fans, but there's a number of recommendations on exporters and both good and bad reviews on both exporters and importers. Generally, the info on the site is more for Canadians, but there are some Americans on there too.
Stick around at Alpina.ca though for info and stuff related to BMW's and Alpina's. We don't post every Alpina that goes through auction, but we'll post up at least some of them