Missing designs!

I got a gift Lamborghini from turn 10 and got some designs for it but when I gone to change to a design to one I already downloaded, it wasn’t there and reverted back to the original design when I first got it. I tried again with another gift Lamborghini to download the same designs but they weren’t there as the game thinks I already have it but I don’t. I remove the original design and tried getting another design and it worked. How can I get the designs I lost back?

The gifted designs are gone once removed unless someone makes a replica.

Done it twice? At least you know next time to not remove the gift designs.