Any of the harnesses with molle straps left and right of the bino pouch will allow you to buy a suitable sized molle pouch from eBay or amazon for your thermal.
Personally I use an emberstock one with Spartan bipod on the right side along with a small knife pouch and a molle pouch from Amazon on the left that fits my Hik condor pretty well
Here is but a few options:-
Easy and quick access to your Bino’s is essential when on the hills, keeping them protected against slips and falls over uneven terrain is also important. The KAHU Bino case delivers this protection and more, a zipped cover to stop debris, 2 x side pouches, grad handles and a engineered harness...
ridgelineclothing.co.uk
Designed with modularity at the forefront, the Recon Modular Bino Harness is based on a chest rig platform that can be scaled up or down depending on your needs with a suite of add-on accessories. It features a magnetic forward pull access to the bino pouch, an easy access large front zipper...
eberlestock.com
Hunting deep in uncharted territory calls for binocular protection that’s more than just secure. Designed for the multi-day, backcountry hunter, the GlassPak™ Pro is a modular chest-harness system that delivers comfort, versatility, and fast-access to critical gear.Recommended for most 42mm or...
www.bushwear.co.uk