This one was my wife's idea, so don't blame me
It's a different shop, so it will not conflict with the other ones.

To install this mod you got to use SOR4 Explorer.

Uncompress the mod files somewhere at your hardrive.
After loading SOR4 Explorer, and reading the game files, navigate in the left panel to: / > decors > main_campaign > stage_6 > lvl_1 > ul_temple
Here you will drop the three mod files in SOR4 Explorer right panel.
In the top right corner you will see a message saying 3 sprites were replaced. Apply.

Note: I'm adding to the download section the original sprites, just in case you want to revert back, without removing all your mods.