For a canopy you might try Global/Hobby Shack - maybe they are "Hobby People" now? They were the Modeltech importer last I knew.

As others said, so many better flying choices for sport/pattern let alone pattern specific. By todays standards it is really a low wing trainer, docile at slow speeds. Enjoy for what it is, certainly capable of decent scores in Sportsman if you intend to compete.

The OPS is heavy but powerful. Likes small props so makes a fair bit of noise. I used to fly one with a YS 60 and my dad with an OS 91 Surpass- flew better w/ the 4 cycle.