Shipping help to PSA

[HOF Auto Rookies]

I have no idea how to ship my card to PSA for grading. I'm trying to send in a card of very high value, which far exceeds the insurance limits of UPS and FedEx that I can get at a consumer level. I spoke with PSA and they said they are ONLY accepting packages from those two for two separate submission addresses.

I mentioned a third party courier service and she said that it would be returned to sender because it isn't from UPS or FedEx. How do I get it to you? She said basically you have to through those companies even though you can't. Asked how others were able to send in their high value items and she claimed there was no way of her knowing.

At the moment, I don't have time to drop it off at a show or fly to California and bring it to their front door. Are those really my other options?

Really, PSA? How the f do I send them my card?