You'll need to double check but a few years ago, I also bought the larger one that didn't fit and then ordered this one and it did fit -
https://www.amazon.com/dp/B00T36TLIO...ing=UTF8&psc=1
It says 3 inch mounting holes.
Honestly, I'm a bit surprised your off by just 1/8th of an inch. My recollection was that this size difference was bigger than that.
Hope that helps.