BMW does not offer heater valve repair kits, sometimes they appeared on Ebay, I just found that the following have them now
FCP https://www.fcpeuro.com/products/bmw...air-kit-fmw202
Ferrulli http://www.ferrullimotorworks.com/#!...air-kits/c1q03
old/new
http://i349.photobucket.com/albums/q...m/IMG_2016.jpg
http://i349.photobucket.com/albums/q...m/IMG_2027.jpg