70 Duster 340 Bilstein Front Shocks

I would contact them directly- you need to actually talk to someone! Their phone number is in the "Contact Us" section: Contact Us - Bilstein Canada In situations like this I never rely on online listings. They have even gone to the extent of ordering Eurospec parts from the parent company for people.
They obviously make them, probably on order for RCD which is why the number is not an actual Bilstein number, but an RCD number. It's probably a proprietary design of RCD, manufactured by Bilstein- they most likely will just refer you to RCD; but you never know... until you ASK!

Good points! I've had luck with Bilstein Canada and they say they can get them and it's only $30CDN to ship to me.