Most mower decks can be used for mulching.
All one has to do if bend a piece of metal and bolt it in the discharge area of the deck, essentially preventing anything from escaping.
It need not be pretty of a tight fit, a fingers width between it and the discharge
chute is just fine.
I've seem them made from scrap metal including license plates
A set of gator blades makes it a perfect setup.
Mow higher than you would for just grass, and the dryer the leaves, the better/easier they become invisible.
Much better to mow/mulch often, then to let them accumulate.