Looking for replacement of Honeywell L8124C1102 aquastat

Hi, I have a Burnham V73T boiler with Honeywell aquastat L8124C1102. About a year ago I noticed that the relay would not turn on the hot water circulator. I sprayed some contact cleaner on top of the solenoid and relay worked for a year but now it is acting up again. Also, the HI/LO settings on it are off by about 20 degrees. I tried to clean the probe, but it did not help much. I am looking for a replacement part for L8124C1102 (which is discontinued), but Honeywell says they will only give updated part number to a contractor. Could anyone please tell me what is the proper replacement for L8124C1102? Thanks.