analog to digital thermostat

Is there a "plug and play" swap from a analog thermostat to a digital thermostat for a North Trail 22fbs?
My concern is I see others posting about the fan only being single speed but, I would like to keep it dual speed.
Are there units available without having to do a bunch of mods? I am capable of re-wiring but, I just want to keep it simple as possible.

Thanks.

Hi Ron,

Not just a plug and play... but just unscrew and rescrew almost... It is an easy change over and this site is the one most used I think. Just need to add the switch to get high or low speed fan. I bought small slide switch at Radio Shack and installed in side of thermostat for fan speed control.

Jim M

Thanks Jim,
I went to the link you provided, it looks like something I can tackle. I really appreciate it.