Help Needed; Danner Mountain Light 2 Sizing?

Hello everyone, I'm currently in the market to purchase a pair of Danner ML2's secondhand in the 30800 colorway/variant. I was wondering if anyone could provide some advice on sizing? I'm a true to size 12.5 and the pair available is a size 13 D which is the standard width as stated on Danner's website. It is advertised that these boots fit narrow and I have a wider foot myself so I figured the extra half inch would accommodate nicely for a roomy/comfy fit. Thoughts?