you really could take your pic with regards to suppliers of fluorescent vinyl.
grafityp do a range, but the one I prefer is the glossy cast one that Oracal does.
https://www.europoint.co/copy-of-oracal-photoluminescent-glo
what you have to remember when trying to match any vinyl, but this type, in particular, is that the life span is short.
So you may have a perfect match but looks miles out due to the age of the piece on the vehicle against the piece in your hand. When I say life span I mean more the colour stability due to UV damage.
Also, if the material has to conform to an irregular surface, the cast is the best bet because many fluorescents on the market are monomeric films due to the life expectancy of the colour.