I've obtained multiple military blankets over the years from traveling, I've done much the same as you've mentioned minus the custom aspect.
We issue smaller woolen blankets (100% wool) to those traveling on a space A basis. Those little wool blankets have accumulated in over the dozen in my catch all closet, as have the large all wool blankets.
Even with those blankets and a smaller one over the feet I've just found they don't do it for me like my HB blanket in colder weather.
Now I am extremely anal about my HB blanket touching the ground, :youcrazy: hence why I've made a doubled canvas ground cloth. For treks I do tend to lean towards my military woolen blankets as I'm not concerned with them gathering dirt and forest floor debris.
In all, if one takes care of their woolen blanket it'll certainly last for years.
We issue smaller woolen blankets (100% wool) to those traveling on a space A basis. Those little wool blankets have accumulated in over the dozen in my catch all closet, as have the large all wool blankets.
Even with those blankets and a smaller one over the feet I've just found they don't do it for me like my HB blanket in colder weather.
Now I am extremely anal about my HB blanket touching the ground, :youcrazy: hence why I've made a doubled canvas ground cloth. For treks I do tend to lean towards my military woolen blankets as I'm not concerned with them gathering dirt and forest floor debris.
In all, if one takes care of their woolen blanket it'll certainly last for years.