They're L.L. Bean boots, so they're only stocked at their stores (unless you can find some from private sellers on ebay...). The boots are made by Chippewa, so you can find similar boots made by them (Homestead, Service Boot, the 20065 "GQ") in a number of places.
They're likely on the same last as the Chippewa 20065... I don't think Red Wing and Chippewa share lasts.