In almost 40 years of messing around with radios, that includes many years of buying and selling I've seen 3 of them.
They are easily the rarest of the D&A Amplifiers, 2 of the 3 I've seen were on Ebay, the third came to me for repairs. The Warrior was definitely a Monster, in more than one respect.
If your looking for one to use my suggestion is consider something else, If its a collector, and just something you want kind of thing, my only suggestion is keep on looking eventually you will probably find one.