I did a little probing on Google using the keywords
Daewoo and KM-475-B, and found a few results. It seems that the illustrious KM-475-B really was a trim removal tool. Having worked at Autozone in the past, I seemed to recall seeing trim tools there. A "Zoner" assisted me in finding the
Door Panel Remover from
OEM Industrial (OEM Industrial Part No. 25313) which cost around $6.00 USD. While it's touted as being "For easy removal of door panel clips without damage", it is nearly identical to the sketch of the KM-475-B as shown in the ALLDATA DIY listing for my 2000 Daewoo Lanos. If you own a Daewoo with this type of connector on its fuel filter, I would suggest purchasing one and keeping it with your (growing) Keep-your-Daewoo-On-The-Road toolkit.