Digital replacement for Honeywell 4006a?

Hey all,

My Mega-Stor indirect water heater came with a mechanical Honeywell 4006a thermo/aquastat. While it works OK, I would like to be able to see the tank temp from across the room as it's location is a bit hard to get to.

Since this is a simple on/off device, surely there must be someone who makes a nice digital alternative.

Any suggestions?

Thanks!