Model 8672C versus 8672A for TRD ORP

Guys,

I am getting some quotes on TRD ORP's. One quote the print outs look similar as Model 8672C and another with 8672A; does anybody know the difference.

I am guessing one code means a vehicle was already been built and another is maybe still in process? I am trying to figure it out. Is anybody aware of the differences?

Also, I know the vehicle is built in Japan but are things like door edge guards/cross rails etc installed there or another location?

 

I have read that the "A" vs "C" indicates a grouping by production timeframe. Sometimes the "C" may cost more simply because of a price increase during the model year.