My damn dog keeps squarshing the speaker grills in my truck, and I've found I can pull them back out with a 90* or hook shaped pick tool.
I just go thru the one of the holes in the mesh, hook the tool thru, and the gently pull the screen back out.
A squarshed oil pump pick up screen is the same kind of a deal, so that trick might work for you as well.
Worth a shot. /ubbthreads/images/graemlins/smile.gif
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If you just bent the screen, you can straighten it, but be sure to check the pick up to pan clearance and make sure you didn't bend the pick up tube as well.