Parts for O'Day day Sailer 16ft first series

I am VERY new to boat. I purchase an old O’Day day Sailer 16ft first series. Need some works.

Model: DAY SAILER
LOA: 16.75 ft
First Built: 1956
more specs: https://sailboatdata.com/sailboat/day-sailer

I am looking for a boom, sailer and a rudder?

Thank you Mario