Unfortunately (or maybe fortunately), Nicolas Smith did a custom run of #96 the "William McFarlan" and #72 Mill Creek was offered as an add-on car by MTH. That limited my options for the passenger cars down to just one of the two packs.
Lionel hinted during their show that open-air cars could be coming sometime in the future. I too would spring for a Hello Dolly as soon as it is offered.