You could build a "tower" from the spring pad on the axle. It would create the upper pivot point for a shackle. It would be about 3" taller than the axle and the shackle would hang down from it with the spring in the lower shackle bolt. The trick is to make it attractive. And, if not attractive, at least interesting to look at. It would raise your frame about a half inch in front. If this idea sounds like somethig you might persue but you can't visualize it, I could do a really crappy sketch and photograph it and post it.
Bob