The SHO uses a Nippondenso 10P15F A/C compressor with a six ribbed pulley. There are numerous places that sell rebuilt, remanufactured, and/or new compressors. The prices vary, and most require that you send them your compressor as a "core".
I would buy a compressor locally, that is at your local auto parts store. Then, if you have problems it is easier to deal with someone "local".
You are going to find out that the compressor will NOT be warranted unless you replace the accumulator/dryer and the oriface lines, AND chemically clean out all of the remaining parts (condenser, evaporator, manifold lines, etc.) Then the system has to be properly vacuumed and recharged.
Be sure that you understand the warranty conditions. Some rebuilt compressor suppliers require that the work be done by a certified A/C mechanic, or they will not honor the warranty. Others only require that the work be done properly, and will honor the warranty if you document the work you did, the parts replaced, etc.
The work replacing parts is not all that difficult, and there is no reason you cannot do it yourself. rangerj