As someone who is ...not well versed in many designer bags (aside from the blatantly obvious) I've been enjoying browsing TheRealReal to see what styles exist. I'm still searching for my"holy grail" larger crossbody for travel, so I definitely feel your pain! Have gotten some lovely ideas - but as most sales are final, and I can't see any of these bags in person (even new versions - I live in the middle of nowhere and the Nordstroms that is 70 miles away is small) I still hesitate to buy....
All that to say - go to a consolidator site of some sort and see what "backpacks" are available and if any look like what you want. I find for myself that the "sleeker" something looks, the less useful it is to me. Apparently I am not a "sleek" person ;-)