I've actually done a quick "fix" for the default RN201 to make it represent the real example in 2018 too. I'm not sure if I'm allowed to upload it though as it's not entirely my own work?
This has always been a very complicated subject. As we are an international forum, law concerning copyright or how copyright can be claimed might be different. And next to that we often have a personal opinion thoughts on this topic.
My personal experience is that most developers don't have a problem with using parts of their original textures. And in general when you ask permission you will automatically receive it. In the case of RealAir that might a bit more complicated as they went out of business.
In repaints often parts of the original paint work is included. Only rarely textures like the pilot, tires, wheel wells, inside of the flaps, etc. are redone in a repaint.
I do not say this is just, or allowed in general, but I have nether seen a developer making an issue about partly using their original textures. Especially when you give them credits for the base of the repaint. (Its of course a good thing to give credits to those who contributed in general).
As an alternative you could set up an dropbox or something similar. You can invite those who are interested to send you a PM and provide a link to the repaint. This will help you to avoid public upload.
Cheers,
Huub
Oh and I surely would be interested like I am in the 'RR232'
