Cigar Hygrometer Question

Hi all!

I just have a quick question. I bought a new humidor which comes with a front mounted, analog hygrometer. Unfortunately, my nephew was playing with the spring at the back and it broke, so I am looking to find a replacement.

The problem, however, is that I can't seem to find one at all. According to the best of my measurement, the hygrometer is 1 3/8" in diameter, and the hole in the humidor is slightly less than 1 3/8".

Has anyone seen a hygrometer this size? The ones I found online are all 1 3/4", and I don't think that would fit...

By the way, this is my humidor:
http://tinyurl.com/cobb9y


Thank you very much!
John