As Larry said, you could input 155.340 with multiple entries on your scanners with the appropriate PL tones for each - makes for more exciting scanning!
Here in Edgefield county, 155.340 is the regional EMS channel and also the only way the helicopters can communicate with our ambulances. Right now, only several law enforcement vehicles have PAL 800 capability and they can talk to the helicopters on the 800 frequencies usually using TG 3888. I hope that changes soon cause sevral times recently the lifeflight was in dire need of proper location and had none. Needless to say...