I've not found a perfect solution to this problem, and even if I had, my perfect wouldn't be your perfect.
That said, I can testify that the Midway compact range bag is really quite sizeable, with 2 internal and 2 external "slots" that keep a gun separated from other stuff in the same pocket. Beware of the "full size" model, though, as it is SOOOOOO easy to fill it up beyond what you can comfortably (or even uncomfortably) carry - don't ask me how I know this.
I just decided I needed a separate bag for my growing family of 32s. Despite my favorable opinion of the Midway compact bag I've had for years, the latest reviews of the bag have lots of comments about plastic zipper pulls coming apart (mine are metal) and other remarks about flimsy construction, so I decided to try this [ame="https://www.amazon.com/gp/product/B01GQVR5UO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&th=1"]Amazon.com : Explorer Tactical R5 Range Shooting, Patrol and Duty Bag, Tan, 17 x 8 x 9-Inch : Sports & Outdoors[/ame] from Amazon. Looks to be a bit smaller than the compact Midway bag but still reasonably spacious, and quite reasonably priced. The tan model also appears to have a non-black interior, something I'm willing to pay extra for after having spent way too much time over the years looking for small things at the bottom of black holes.