I am a bit puzzled as the primary material for kickstands on the market is alu. Steel is used, in the form of a bent rod, in the lowest end kickstands and, to encounter steel again, you need to go to high-end kickstands. In terms of sturdiness the majority of kickstand offerings in the US is pretty marginal, but your issue is not with the sturdiness. Getting the right balance will always be iffy with single-legged kickstands.

If you want something looking nicer, just go to a store, possibly another one, and peruse what is available. Some single-legged kickstands are adjustable, so that anything that you do in terms of balancing can be reversed. Without a kickstand plate, a center mounted kickstand will always loosen. Crimping of alu chainstays might be an issue. A stand mounted by the rear triangle might hold better but might not hold the bike as well as a center mounted stand.