Hi robischult.
Welcome to our Mattress Forum.
Outdoor daybeds aren’t really are speciality here in the forum, and to my knowledge none of our Trusted Members currently sell outdoor furniture. Outdoor daybeds can also vary widely. Some are chaise-like, others are round, others are square and more similar to a mattress (albeit much thinner).
You’re not the first person, though, to ask about daybeds in the forum so perhaps this forum topic as well as this forum topic may be of use to you in your search.
Best of luck and do keep us posted!
NikkiTMU