I bought a set of 727 First Class seats on e-Bay several years ago. They had the little secret compartment in the center arm rest when the new technology of an air-phone would go.

Unfortunately they did not stay at my house . they became seats for a cousin's home theater the minute they saw them.

If you plan on purchasing some .. look into the power requirements for the motors and such .. i think they are odd (for a household) voltage!