Caster, I hate to do it, but I might need to rescind. I have th eopportunity to complete another trading circle with diff bonus resources that I personally like. I've tried sending PMs to a couple guys with my resource set to replace me, but no responses yet.
I've looked for aqua nations with aluminum and marble (even sent PMs to them as well) and that looks like a tough combo to nail down. Barring a new nation or a color change from someone, I don't think the options are there.