I know there are a lot of TV repair kits on places like ebay. I imagine maybe they are talking about buying this lg repair kit and hope to install it inside their sony tv. With that said, i would not purchase an LG repair kit for a Sony tv. That or he is trying to put the screen part of a sony to fix a busted lg tv.
if i remember correctly, Sony CRTs have a different pinout than the "standard" CRTs that got used in almost all other TV sets. LG tv's probably used the same Samtron cloned CRTs that were used in everything, including computer monitors.