I had to dig through a 2011 Texture Pack Archive to find this Planet Minecraft page, but after downloading the pack from here I have confirmed that the one Ryoui found and the one in this page is version 1.5. https://www.planetminecraft.com/texture-pack/shortstuf7s-clean-design-pack-641/ Of course there aren't any other posts by this user or any other posts with a title along the lines "ShortStuf7's Clean Design Pack" Another dead end for a newer version...

Edit: Checked the Texture Pack archive for 2012, 2013, 2014, and, desperately, 2015. Nothing. AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

I searched so hard and so long in the same exact way and somehow didn't find it... DOESN'T MATTER. WE HAVE SOMETHING! If I had to guess from screenshots and videos that exist, this is most likely 1.0 or close to it. All other videos and screenshots of the pack seem to have different wool, bed, and sign textures. Regardless, if this is all we have, I'm far more than happy enough. I did a little conversion/update/restoration on stream pretty much directly after Ryoui found this. Will be posting it in the Resources section shortly, as well as gifting Ryoui a 7tv sub as she requested (its $5 and she earned it).

I'm gonna start digging through texture pack archives to see if I can maybe find the last version, but for now, we have v1.0. I feel like I'm dreaming.

Yes I'm for real I will actually venmo/paypal/cashapp you five entire dollars.

The texture pack was called ShortStuf7's Clean Design Pack. The original Minecraft Forum post can be found here: https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/resource-packs/1223310-x16-shortstuf7s-clean-design-pack-v4-0-full-1-6-x

As far as I can tell this is lost media. I can't find a single download link anywhere. It's possible that the creator of the texture pack still has it, but I haven't bothered reaching out anywhere. Regardless, having the texture pack that was originally meant to be used with this map would make the experience feel a tiny bit more complete.