Does the Escrow.com integration use the optional "concierge" option? If not, can you make this configurable? I wouldn't use Escrow.com without the concierge option enabled as it's much safer.
Even so, Dynadot is literally the only large registrar that even offers it. Do you know of another large registrar that let's you do that? If so, which one?
First of all, I was looking through Dynadot's features and linked in the site footer is "Grace Deletion". Apparently, you can just make a request to return any domain for a small fee and get a refund. They encourage you to register domains, try...