It was a better dinghy than normal for that size trawler, perfectly sized for the number of people the PO usually carried, well equipped with its own radio, plotter, sounder and fishing gear, so the Previous Owner refused to sell it with the boat.
Now it is up to you to replicate with a dinghy that is perfect for your use, that is easily carried or towed, that uses the fuel you prefer, at the rate you are comfortable with.