After trying several times (and failing) to contact them, I drove out to discover parts are available by will-call only. Per the posted signs, there are no walk-ins.
Maybe the owner is on vacation, it is that time of year, but unless you can get a hold of them there will be no parts available.
We have done business with Miller's for years!
When looking for components for building or rebuilding equipment, we've always had good luck finding what we have needed, at a great price!!!