Really? Surprising as whenever I call a store they're more than happy to provide measurements. I would call Bleeker before anywhere else - seems to have very competent staff. Alternatively, Dastig in Chicago has been very helpful for me in the past and will hunt down items. I'm sure that he would be more than happy to help if you contacted him.
Maybe I've just had bad luck. It's not something I've called a bunch if times. I think I called bleaker twice over about 3 years and the Hampton shop like 3-4 times. I mean its not a huge deal. I know what sizes I need but having more information always makes things go smoother when you're buying online or over the phone. It just seems like it would make sense for them to offer curate sizing and fit descriptions.
Either way RRL is one of my favourite brands without a doubt.