Wherever you sail, there's probably a good sailmaker nearby...
Our main is somewhat near yours in size and the shape and set are still excellent, and it's over a decade in age.
It's a UKSails dacron with the previously mentioned "two plus two" batten scheme. Loose footed.
So do some shopping and comparing.
If it's been a looong time with that same "old" sail, you'll be pleasantly surprised at the increase in drive accompanied by less heeling that a new sail will give your boat.
Loren