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.