I would call them, I bet you can order it on the phone also.
I tried too, same results.
We have a Harbor Freight store close by which is where i picked mine up, I was shocked the price dropped so much because it's been a real good gun for most of a year so far.
Call 1-800-444-3353, Monday thru Friday,
6:00 am to 4:30 pm PST time, to speak with a friendly
Customer Service representative who can help you with
any order questions.