You might try a small flexible tube attached to a vacume cleaner. With a small tube, you would probable get a lot of suction, so maybe close would count.
I don't think you mentioned what manifold you have. If it's single plane high rise, I'd guess your in worse trouble. If it's a dual plane, I'd imagine the washer is sitting just under the carb.
You also might see if you can barrow or rent one of the fiber optics camera setups that seem to be very common now. It would probably find the washer pretty quickly.
Good Luck : )
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