Raisng 1 pipe steam radiator by 2"

JudyGarland_I_Got_Steam_Heat

A contractor just renovated the 2nd floor bathroom of my antique home. The floor needed extensive structural repairs which resulted in a height increase of 2" where my radiator formerly sat. He thought he could just tug on the pipe a bit but there is really no movement at all and the L on the first floor below is only 1" from the ceiling anyway. I called a local radiator salvage place that also sells parts - I posed my dilemma to them. Their solution was for me to purchase a new radiator from them and sell them mine- hmmm...something tells me this "solution" was more in his interests than mine. Isn't there a way to extend the height by 2"?  Can I simply replace the valve at the radiator connection and add a 2" extender to the pipe before replacing the valve? Does an extender exist? I am sure this problem has come up before... Thanks in advance for any advice that can be offered.