Many companies that sell trekking-pole supported tents and tarps offer optional folding poles, which would probably work fine with your Shangri-la 1. I know Six Moon Designs sells both a folding 45" aluminum pole ($14, weight 3 oz) and a folding 45" carbon fiber pole ($30, weight 1.8 oz), which they sell separately. They can be a little hard to find on the Six Moons website; looks under "Tents" and you'll see the poles listed about halfway down the page.
Of course, if you generally camp in wooded areas, you could just use a stick (free!).