If you open this PDF file link and then search for 1er there are a few more Herpa 1:87th numbers
http://www.google.co.uk/url?sa=t&rct...pOZQf4kQYeCmZG
023290 BMW 1er
033299 BMW 1er metallic
023870 BMW 1er Coupé
033879 BMW 1er Coupé metallic
023979 BMW 1er Cabrio
033978 BMW 1er Cabrio metallic
I have also found a search of eBay Germany for Herpa E82 or Herpa 1er comes up with some good results as well.
Herpa e82
https://www.ebay.de/dsc/i.html?_sop=...3879&_osacat=0
Herpa 1er
https://www.ebay.de/dsc/i.html?_sop=...odkw=Herpa+e82
Herpa 023870