What’s up with buying a parking pass?

Last game I went to was last year. I used to be able to add a parking pass when buying game tickets, but I can't find the option to do that anymore. MMP website now tells me to book a spot through "spot hero", however, spot hero only lists unofficial parking lots, not lot A, B, or C. Stub Hub has them, but Lot C is $90+ with fees… pretty sure that Lot C was in the $40 range in the past.