From what I can see, Dom, there is no such thing as (good) cheap heated gear. The top names over your side seem to be Gerbings, Keis, Blazewear and - a new one on me - 1st Heat. Typically if you want to ride warm and snug you are looking at laying out a good few hundred dollars. I feel sure that the hardier riders on our famous On Two Wheels forum will soon be chipping in with the best advice available on your side of the pond.
Looking at options over here I can get Keis Vest, Gloves and controller for around £325/$520 whilst going for the Gerbings jacket and trousers plus gloves is heading for the £1000/$1600 mark. Heated socks are also available at extra cost. Keeping warm is nice but cheap it ain't!
Ken.