I just bought this guy: https://www.amazon.com/gp/product/B074MYKZQ7/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1

Haven't had much time to walk around with it but it fits my GX85 with kit lens attached (little pancake zoom) along with a 45-150mm zoom lens. I have a little drawstring bag that includes some accessories like batteries, lens hoods, etc. that sit in the top "section" that the velcro dividers created (each divider has a flap attached at the top that covers whatever's underneath) as well as a case containing some filters. That top section could probably fit one or two lenses no problem, preferably with some sort of sleeve or pouch to give them some extra padding since the top section is a bit loose without the dividers. Then there's a front pouch for whatever else you want to stuff in. Really small form factor too, ends up looking a little cube-y when fully stuffed but the canvas/knapsack aesthetic helps with that.