Need help finding an online keyholder

Right let me run this down

I'm a tourist in this whole chastity scene, and want to see what my body does under the stress of chastity for couple of months.

I own a time safe and all, but I'd like a human to hold onto the other key just to ask for it if there is medical need.
Because of this I need to have a Keyholder in the US.

I would like it to be nothing sub or dom about the relationship
Just me sending an envelope with the key and a date to ship it back, and contact information if something medical did come up.

Any suggestion/people willing would be welcome