While we don't do Harnischfechten (yet) it's more from a lack of armour, than lack of desire. And who doesn't like an awesome suit of armour?
So here are some fo the more reputable armourers out there.
Historic Enterprises is a California based company. Jeffrey Hedgecock is the armourer there, and one of the worlds top in the field. A full suit can be upwards of $30k.
