Yup, can try using the search function for malta. However, I've looked up what malta is before (someone was drinking it around my area) and I found I would be allergic because it's pretty much what beer is before you ferment it.
This means, of your options, you can make it using malt extracts and malt syrup solids. Or you can make it from malted grain (barley&wheat). Along with any desired extra flavorings including varying the malts (roast level).
This is all I can help with, since I'm allergic and I use sorghum as my beer base, and it does not seem to make an unfermented carbonated drink that I like. I just use cane/beet sugar and flavorings.
After a quick search, there wasn't really too much. I'd go with Revvy's post here from '08 http://www.homebrewtalk.com/f36/non-...57/index2.html
One other post had a link to someone's website about malta but the page could no longer be found (even though that website's search could find the blog post) It was linked on January first '11 by none other than Revvy.