I have a 185 carlos sainz that came from factory with standard 4 speaker sound system.
I tried to find a set of system 10 door panels here, but it was impossible, because the standard alltrac (non RC) was never sold officially in spain, only st182s or st185 carlos sainz were available so there are only a few import units.
Searching on ebay i found a set of door pockets and speaker mounts:
I drilled the 7 extra needed holes for the screws and it fits perfectly, but i have no idea about how to cut the door panel, shape, size, etc.
Anyone can help?