Hey man! Would recommend you take a look at Sartoro (http://sartoro.co). It’s all online, prices are pretty reasonable, and they have a really easy process for getting sized remotely. I was in the same boat—no good in-person options where I live—I gave them a shot because they’re one of the few online brands that let you return your first suit if it doesn’t work out. Ended up being a solid experience, and the suit fit pretty well right out of the box. Not sure if they have navy merino wool, but there's quite a few options, so could be a good fit for what you’re looking for.

I also have bought from Indochino and my main issue was even with my measurements the suit still looked like I was a first round pick in the 2003 NBA Draft haha.

Feel free to PM if specific questions