Shorter serpentine belt to bypass AC

No way to do that without a bypass pulley to take the place of the AC pulley. Did the clutch bearing seize so it will not turn or is it the compressor itself? If the clutch turns free just remove the power connector to the clutch and replace the compressor whenever.

Yeah, that sounds like a failed clutch. Dorman makes a bypass pulley for it for around $40.00. Or you could get a clutch kit for around $75.00 A complete new compressor is about 175.00.
They are not real hard to change, basically the system gets evacuated, you remove the belt, disconnect two electrical connectors and remove three bolts and the bolt for the line block. To reinstall you use the new o-rings that will be with the new compressor in the line block, torque it down, install the three bolts, tighten them good, reinstall the two wiring connectors and put the belt back on. Then have a shop recharge the system. If you have a shop you trust you can ask them if they would evacuate and recharge the system for you, with you doing the swap.