Edit: For those interested, I added a mod that lets the armor variants be crafted:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3037325329

Heya, this was on my own mind for a while, so I thought I'd give some useful info.

The western & southern hive have their own differently-textured variants of the craftable hiver armor, but in this version of the mod, there doesn't seem to be any way to craft those versions yourself. Thankfully, I think I found a fairly easy workaround.

By using FCS to edit your save file, you can take the texture of the armor you want and apply it to your crafted set. It fits on smoothly, and lets you attain the fashion without any deeper tweaking.

I am not very versed in the FCS at all, so there's likely a lot of details or tricks I'm missing, but for anyone looking for instructions here's a step-by-step. Just try to back up your save first, just in case.

1. Start by making preparations in-game. Obtain the item you want to equip (crafted hiver leg plates, torso, etc), as well as the item you want to take the texture from.
   
2. Using FCS will be easier if you make sure a character is only carrying those items, and nothing else. Put them in a squad alone and save the game. It will also be easier to tell the items apart if you equip one of them.
   
3. Find your save files. This will likely be in AppData\Local\kenshi\save
   
4. Find your platoon file inside your save's folder. The squad names you have written in-game are NOT used here, instead they have default names from when you created them (such as FactionName_2)
   
5. Open the Forgotten Construction Set. When it asks you what files/mods to inherit, you can just close that popup.
   
6. Click "Open any" and find your platoon file again, then open it. You can also click "Changes" to see a more useful list of contents.
   
7. Check the "INVENTORY_ITEM_STATE" entries to find the armors. Look at the attribute called "section" to see where the item is held. "main" is your inventory, "backpack_content" is in your backpack, "armour" is your torso armor, etc.
   
8. When you have identified the item you want to take the texture from, look at "material sid" and copy its content. It should say "[numbers]-Hiver_Expansion.mod"
   
9. Find the other armor piece, and replace its material sid with the one you want.
   
10. Save the file and load it in-game!

This would be easier if you already know the material you want to take, of course. It would prevent you from needing to yoink any armors in-game.

For example, here's the ones which I've tried:
Southern hive torso armor: 1535139-Hiver_Expansion.mod
Southern hive leg plates: 1535138-Hiver_Expansion.mod
Western hive torso armor: 1535105-Hiver_Expansion.mod
Western hive leg plates: 1535106-Hiver_Expansion.mod