Thanks, Jazzyvee. I tracked down Glenn yesterday on a search for custom gig bags and contacted him. He responded quickly and has promised some prices and options today. I've also contacted the folks at Reunion Blues and a couple shops that are familiar enough with Alembics to understand the situation I'm in.
Jimmy, the thing is I can squeeze my bass into a Gator bag that I have now, but that squeeze puts a strain on the zipper and will ultimately lead to a lost bag - and a double bag in this instance. I'm using it a s a stop gap, as I said, with the tip of the very headstock left exposed to possible damage if I run it into a doorway.
And while I appreciate the debate of case vs. bag that's not what I was looking for. I'm a case guy for protection and transportation - expect when in this case. When it takes me longer to prep the car than so the case will fit than it does to drive to the gig then a more convenient solution is great. And since I'm usually not transporting an amp and other equipment that can badly damage the bass during transport, the types of things that could happen during that time that might damage the bass in a bag would likely damage it in the case as well - or at least necessitate a new vehicle to transport it, if you get my drift. And unfortunately, my location doesn't provide me access to a lot of places that sell the type of bag I'm looking for, so trying something out first is near impossible.