Think Tank Retrospective Lens Changer 2,
a small bag, perfect for carrying just a couple of lens and filters.
I've been looking for the 'perfect bag' for months, searching for a small bag to carry a couple of zoom lenses over one shoulder, while carrying my Sony a7ii on the other. This Think Tank bag solves the problem elegantly! It has two tubes, one is slightly larger, designed for up to a 70-200mm lens. Actually, both tubes are actually larger than they need to be for the Sony 16-35mm (or 24-70mm) and the 70-200mm lenses.
In addition, the bag is very well constructed, yet lightweight, and is inconspicuous, looking more like a messenger bag than a camera bag. Another welcome and novel feature is a simple way of activating/de-activating the Velcro closures. When 'off' the Velcro doesn't work and one can open the flap without resistance or noise.
This information is being shared for others out that have been on the same search: I have no affiliation whatsoever with the manufacturer, other than as a very satisfied customer.