I noticed that you asked your question in January, but thought I'd respond incase you are still interested in a NY source for future reference. There is a company called Regence Picture Frames
www.regencepictureframes.com . They are great to work with and will customize a frame specifically for the portrait if you send them a photo of the portrait. My clients have been pleased with their frames, and I have not been disappointed yet. The owner's name is "Bob" and you can ask for him if you want advice that the receptionist can't help with.
Mary