Whole grain pastas are okay, in moderation just like the other treats.
Petsmart carries Mazuri and Oxbow. They cost quite a bit in store, though. It's much much cheaper to purchase feed from someone on here, even with having to pay shipping.
Just for clarity, when someone mentions PANR, it is Purina Advanced Nutrition Rabbit, show formula. Several people on here sell it, and it can usually be ordered through a local feed store, as can Mazuri and Nutrena.
No people food for chins, except those listed as safe treats. No fruits and vegetables, either. Your chin will be healthiest on a good quality pellet, hay, and water.