Can you check the files to see if the other costumes from the Gamecube version is present in the HD remaster?
Yup, they're there.
I'm not on my home PC so I can't get you the very original texture files, but I believe I have the edited ones uploaded somewhere.
Actually, now that I'm looking at it, I think it's actually only specific stuff that was higher res. I've got a higher res face texture, and I took the higher res "Stars" patch and emblem from Jills top and hat respectively and used those. I guess there wasn't actually higher res uniform textures. I do remember that there was some version of higher res texture for Barry as well, but it was also probably just the face texture.
If you want the face texture example as well as the higher res Stars patches, this is the zip download that has those texture examples in it
I compared all textures between ingame and cutscene models, and they're all identical. I'm gonna bet they just used the highest resolution they could use for both. Like the beret texture is surprisingly high res compared to everything else.