Hard time finding a short full mattress.

We bought ours from Overstock.com

Was a really comfortable mattress. Came rolled up and decompressed which made it easy to get into the camper.

Verlo mattress will make any size mattress you want. Verlo Mattress® stores are located in Wisconsin, Illinois, Colorado, Iowa, Georgia, and Missouri.

Foam and cut it down yourself, or modify the bed to allow for a full length mattress (if possible). At 6' tall I find the short mattresses annoying so I'd convert to full length if the trailers configuration would allow for it.

A good store will order a custom cut foam mattress for you. Extra cost of course.

I never heard of a short full just short queen. There are places that will make custom mattress. Or you can purchase a memory foam and cut it down.

A full mattress is 54x75 a short queen is 60x75 a regular queen is 60x80. If you get any shorter on length then 75 inches you might not have enough room.