The cheapest, simplest solution --- free --- is to raise the stem about 1-2" or so. Keep in mind that you're limited to leaving 2.5" or so of the stem in the fork. Or replace the stem with a taller unit, or a threadless adapter and a threadless stem with more rise.

The alternative fork won't be of much, if any, help at all, since the extra length is simply the clamping area for the threadless stem it would call for. When comparing threaded and threadless forks for effective height, figure that a threadless fork needs to be 2-2.5" longer than the threaded to compensate for the other design factors.