Prompted by this question, I checked dh's 403b to see what the third party administrator, Omni403b, was charging for the Invesco Oppenheimer fund. That info was not listed anywhere. But what I did notice was they have new funds available including, drumroll, Vanguard, which wasn't previously available. It also said somewhere that the Invesco index fund had a max 5.5% load, but it didn't seem like anything was being deducted except for 30 bucks a year. Not sure if that was going to Omni or Invesco.
Anyway, switching everything to Vanguard, since, aside from TSP, all of our other money is there so it's easy to keep track of. Not sure where I can find out what the Omni fees are, or if dh's work pays them. There's no match so maybe they pay the fees.