Framing a Flag - Square not Triangular

[Bagel Framer]

Hi,

Has anyone ever framed a flag as per the sink mount method on page 60/61 of Vivian Kistler's "Framing Collectibles" book - BUT square and not triangular?

I have a client who wants to frame a squadron flag but only wants part of the flag showing - approximately 1 foot square of it.

The folding doesn't phase me, I was just wondering if you'd framed such a shape of flag before or have any examples please?

Thanks,

Sean