analog - Absolute value circuit around a non-zero value

I have searched for a few hours on the internet and in some circuit design books, but have been thusfar unable to find a circuit that produces absolute value around a number other than zero. Does anyone here know of such a circuit? An example IO would be: At Vin = 10, Vo = 10 At Vin = 9, Vo = 11 At Vin = 11, Vo = 11

I'm hoping to accomplish this with a single absolute value circuit, rather than subtracting 10 beforehand, taking the absolute value, and adding 10 or offsetting the result.

Thanks for any help