Allan often has trouble with PMs and sometimes emails getting lost, both here and on other forums. My advice would be to call him during normal weekday business hours.
He'll ask for measurements before he builds the armor. It's not off the shelf, so it should be sized to your measurements, as best as is possible considering it's just measurements over the internet, unless you're physically there for some test fitting during the forging.
Allan seems to be very "down in the dumps" on his armoring lately. In addition to asking questions and/or ordering, it would be nice if you could tell him how great his prices are, how nice his armor looks, or any other compliments you can give him. I am sure he would appreciate it.