I recommend you call Big Apple Herp and order one of their proportional thermostats. I use them on snake cages; I’ve used one on an incubator. They work fine. I see from a banner advert here that they are even having a sale right now. The times that I have dealt with Big Apple I was impressed with their responsive customer service. I’ve heard the same good reports from others who post on Kingsnake.
Of course, there are other good proportional thermostats available now for you to consider. But for sure, none will do you much good if it hasn’t arrived by the time your eggs do.
Good luck!
-Joan
>>I ordered a Helix Thermostat back on Jan. 9th, and they're so far backed up, I haven't received it yet. What other reliable options do you have out there?...This is to run my incubator, and I have about a week to get it in. Thanks.