The current "member locator map" has provisions for adding MV Suppliers (which of course would include salvage yards), and the little map icon is a different color - red is members, yellow is suppliers, and green is assistance members, black is DRMO lots...
I went in a while back and added all my local So.Cal suppliers - Barstow Truck Parts, Antelope Valley, Walkers. I noticed Memphis Equipment is on there, too. If everyone added their local suppliers and MV boneyards, people planning a trip could easily see both suppliers and members that may be near where they're going. So personally, I don't think a separate map is needed... we all just need to fill up and use the one we've got.
Regards,
Jon