I own a 2009 Horizon Blue Clubman. When I ordered Mini had an option to have a Union Jack (decal) applied to the roof. Now, nine years and 65,000 miles later, the decal has seen better days. I've looked all over the internet and can't find anywhere to source a replacement decal. Thought I'd ask here to see if the "experts" would have any suggestions.
I was also wondering about the possibility of getting the top wrapped, but I'm not that familiar with the process and how that might affect the sunroof operation.

I did have one guy who owns a local car restoration shop suggest for longest life to have the Union Jack painted on the roof. Unfortunately the $3500 price tag was a bit of a deterrent for me. I'm not planning to get rid of the car anytime soon but I'm pretty sure that I'd never see the return on that investment.

 

I got mine at Fastsigns about eight years ago, it is still in great shape. mine is perforated, so it lets about 25% of the light through. I can barely see it from the inside.
I paid $200 installed.

Fastsigns is a national franchise company, the local shops are privately owned.

https://www.fastsigns.com/