The texture.cfg is what tells the sim which folders to look for to get textures. And 'fallback.x' is the priority of folders.
The base ini textures has one custom VC texture file. It adds a small fix to the default VC textures. But since the priority of this texture from the base pack is higher, it gets loaded in the sim. Therefore, changing the priority of the folders should get rid of this problem.
This fix is applied in the HB textures version as well, so swapping folder priority shouldn't be a problem.
Change the texture.cfg entry of iniBuilds repaints to the one below and see if that fixes the issue.
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[fltsim]
fallback.1=..\..\FSLabs A32X\texture_VC
fallback.2=..\texture.ini_base
fallback.3=..\texture
fallback.4=..\..\FSLabs A32X\texture
fallback.5=..\..\..\..\Scenery\Global\texture
fallback.6=..\..\..\..\..\..\Scenery\Global\texture
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Be advised that any repaint with custom VC decals(off the top of my head I can think of IndiGo airlines which has a couple of airline specific decals in the cockpit in real life) will run you into the same issue. Unless the repainter provides a specific version for HB textures users.