Shallowest Umbrella for Confined Spaces?

I'm shooting in a confined space with low ceilings, and if I use my standard reflector umbrellas, the center pole sticks into the shot.

Does anyone make an umbrella with a short center pole, or any other lighting solution like soft box, etc. for confined spaces??

Thanks!

-=-Joe
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portfolio: http://streetnine.com/
daily photo: http://streetnine.com/blog

(I am NOT the terrific nature photographer Joseph Holmes at josephholmes.com)