I need about 35 panoramic frames for photos 5.5" x 13". Any suggestions on where to buy?

It's for the group shot I did at the lake a couple of weeks ago. She wants to do cropped versions of it now since it was so hard to really see everybody. She originally wanted 4x6's but after showing her the test print she realized how small they looked and how much better a panorama was for the scene.

Thanks! I did a quick Google search but haven't really looked hard. I was hoping some of you guys had a tip since I know you do frame stuff yourselves. I could go the custom framing route but they'll pay out the nose for that. She's hoping for a prefab panoramic frame size. Dimensions can vary a little without cutting off the hills or the feet.