That's cool that they actually confirmed that it's for sure Last Crusade and that's the only license they have. So at least, for now, there’s no more guess work. The worst thing would be be to get this TLC version, then Disney sees how quickly it sells out and allows JND to have the Raiders and ToD licenses.
To your point on converting it to a Raiders Indy, it could definitely become an even more expensive endeavor to do so. Aside from the pieces you mentioned, if you really were to go all in, you'd also need to replace the jacket. All the changes would undoubtedly cost nearly the price of the statue itself most likely.