Michaels

I would call the store. They sell frames but you may have to do it on your own.

More often than not you're going to have a member of the general public answering these questions especially for larger stores. Best bet would be to call the store direct. You may want to inquire with some glass shops as well.

You might want to call the store an ask.

Yes

Need to contact the store directly. These questions are answered by the general public!

Not sure about bigger but I think better