Shipping it to China definitely cost prohibitive. I would probably replace both of them and have the old one for a spare. I have an Schwinn SS DBX that has mismatched shifters, right 4500 and left 4400. I have replacement for the 4400 If I decide to do that. I am actually leaning towards using the 4500's on an early 90's road bike, it has DT shifters still. I have them in friction mode and am using a 10 speed cassette with them. It shifts great, but I think I would like it more with the STI shifters, That would be a strictly 9 speed set up all the way.