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There is a couple of options on shopruger.com that merge the rear sight into a rail system which sound like a good starting point for what you are looking for.
http://shopruger.com/70974-10_22-Ace-In-The-Hole-Set/productinfo/12938/
http://shopruger.com/70974-10_22-Ace-In-The-Hole-Set/productinfo/12938/