There are, or perhaps were ebay sellers selling alternate source kits, but I found that the price difference was minimal compared to the Hasselblad kit. So, like Jeffrey, I just contacted Hasselblad. Can't speak for Europe, but for Hasselblad USA, ordering the kit (by phone) took maybe a minute, and I had it in my hands a couple of days later. There are some discussions in here of DIY materials too, if you'd prefer that route.