At Russ; Dragon Care USA. Last used them (OK, him, as it's, by his own statement, one guy handling bits from a pile of kits - usually returned and / or damaged kits from retailers back to the distributor, who passes some to the D-C guy for parting-out to us hopeful modelers - ) back in later 2016, before I packed my stash and relocated. Haven't had any occasion to engage D-C since then, but suspect that actually little has changed. Get in live phone contact with the guy and you may get somewhere.
Robin; The site policy does say receipt is needed... As I mentioned above, I've managed without. But that's only been my experience, and other's may be quite different! Dragon Care USA is, far as I know, pretty much "only" servicing US customers. Is there some analog Dragon Care operation serving Europe? If so, they may do things rather differently, I suppose.
At Ivanhoe6 / all who may at some point try to deal with D-C:
As all likely know, many of the D's kits are parts of series of related subjects (efficient use of molds and all that). Many sprues are in common among several kits. Knowing what other kits may have the sprue or part that you seek enables you to press D-C when told that he doesn't have the specific kit you asked about. Going in knowing about the sprues and the kits which have them is your best ammunition as you go into this breach!
Cheers! Bob