I get most of my ingredients at Trader Joes.
For beans I usually do dried and cook them with Kombu in an electric pressure cooker on high for 13 minutes.
For the wrap you could substitute Nori, or Tapioca Wraps for this.
If you like hot, add some adobo or chipotle chilis in the beans while they cook! The sweet and hot together can be amazing.
Adapted from Fine Cooking