The flyboys use Hyrdoturf. Hydroturf sells single archbars on their site and elsewhere. If you plan to pull all the traction off, be ready to get some goo-gone or other product help remove the residual adhesive. A lot of people like the arch bars from Xtrak, as well. They sell 13 and 15" arch bars in 2-3" lengths 'designed' or intended for skims and longboards. Your typical surf industry rear pad will either have an integrated arch and kick or will be flat. As mentioned above upper pads are not really used in the surf industry except sometimes on longboards and don't have integrated arches... If you want to integrate an arch into your current traction you can do this with a single edge razor blade by cutting the arch pattern out. The traction will slice really clean with very little pressure. Then just pull off the cut out area and place the arch in.
In the past we use to take a typical rear pad and cut the kick tail off and place it upside down for an upper pad...... this is also an option, in so much as you can get rear pads for as little as $13.