We've got a cluster on khaz modan. The guild bank supplies bags, whites, str/int elixirs, buff foods, and eng mats.
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I wanted to come back and say this, there are quite a few guilds that will provide the above. You should consider what times they are active and if you just enjoy playing with them. Guilds add a fun dimension to twinking and if you don't like the personalities involved, it can suck. So by all means, try several guilds out. If you want a temporary home while you look, consider us. It won't offend or bother us at all if you find a better experience in another guild. We are most active in the evening, with groups running pretty much every night.