Yeah, it looks like most likely no one here has the SKU you're looking for. I checked and the one I own (which I bought from someone else here a while ago) is also the Dice publisher one. To be fair, there are a lot more people out there who probably might still own the CDs for the SKU you are looking for, but no longer active in anything Lemmings-related (so they wouldn't be on this forum), plus we've also seen people like "Deceit" who only found this place very recently.
Perhaps a different forum more oriented towards collecting/preservation of old PC games would be a more fruitful place for you to ask. That or if you're willing to spend extra money to buy a second copy online, there's a decent chance you can find it on eBay or similar.
Paintball being one of the less traditionally Lemmings-like Lemmings game, it doesn't surprise me that even most people here don't own the game, heck many probably never even played or installed the game. Good luck with your search (if you decide to keep searching and not open your own box).