The one that demshateGod linked to has lots of attachment points and should come with a 2-pouch ortion to replace the shown pistol holster.
Thanks! I didn’t know that was an option. Probably best to visit a store that sells ‘em and try each on for size. I know a lot more about what’s available now, thanks to you guys. I lean toward the MOLLE system, even though it’s more expensive initially, it comes with pockets for ballistic plates and can be configured however you need - even set it up for a shotgun.