Product upgrades

What would be a good replacement for a Ambirad STB 175? What would be a good replacement for a Ambirad STB 100? What would be a good replacement for a Ambirad STB 125? What would be a good replacement for a Ambirad STE 300? What would be a good replacement for a Reznor EUROPAK 2095-10? What would be a good replacement for a Ambirad STE 225? What would be a good replacement for a Ambirad STE 150? What would be a good replacement for a Ambirad STE 175? What would be a good replacement for a Ambirad STE 100? What would be a good replacement for a Ambirad STE 125? What would be a good replacement for a Ambirad STE 400? What would be a good replacement for a Reznor EUROPAK 2095-20? What would be a good replacement for a Reznor EUROPAK 2095-11? What would be a good replacement for a Reznor RPVJ? What would be a good replacement for a Reznor RPVE? What would be a good replacement for a Reznor EURO-T2000E? What would be a good replacement for a Reznor EURO-T2000E? Is the Nor-Ray-Vac LR pressure switch L104040 still available ? Is there a replacement for the Vision Pekron 900467 controller? Is there a replacement gas valve available for the AR Radiant Heater ? Is there a replacement for the Dungs gas valve for the Nor Ray Vac? Is the Pactrol P14 sequence controller part No. 2000 still available? Was there a change to the Rheco Ionisation and ignition probes? They look different. Is the MaXsys S4966V2 burner controller still available? What fan control relay should I use for my heater? Is the White Rogers Gas Valve still available for my Vision Radiant heater? Is there a replacement for the Honeywell S4563C 1027 ignition controller? Is there a replacement for the Guardian Electric Air Curtain Control Panel PCB? What is the replacement for a Black Bulb Thermostat? What is the replacement for an AS1 control panel?