First, RG have been very generous with straps. For the most part with these rubber straps they have gifted them.
I said interesting comment a I had seen the C6 mounted on another strap at the manufacture last month (I think a strap for the C5). And it looked really good.
I asked could I buy one but the answer was no; they do not want mix straps across the various versions of the C. So you can obtain what the spec’ed for your version, for the C6 that is gray, orange and white.
If you want to mix straps, and you will online that some people have, you need to own multiple C watches. Or somehow acquire the strap otherwise.
I understand their position from a brand perspective. I don’t agree with it though.
As for the solution; no, it is something else.