Reg:
Sorry about that, I thought the link would take you right into the original post.
Here's a copy of the DFW pilots' forum post with a contact number. I don't know the poster, but his ID is Dr. Bill. Neither do I know if this seat will work in a G model, but others on this forum probably do know.
"I bought this, expecting to install it in my 150L. Changed my mind. Please take it off my hands! Asking 125.
Thanks! I live in the Waco area, but can deliver. (In a 150...) 254.644.4966"