Richard, your car could have aircon done in day or so quite easily. Your engine already has the mounts (and a compressor that is likely too far gone to use, but easily replaced).
I know (and agree with the compressor, have had someone (not a professional, lol) say mine could get reconditioned, but I think it far more likely it will need replacing), but it's not high on the priority list. Though with the temperatures this week, maybe it should! lol