I added this little lot to my DBA collection a month or two ago, drawn from a larger DBM army (which frankly I don't use that often any more - well not at all, and yes I could use it for FOG, but haven't really taken too well to that either).
So I took the necessary stands from that larger DBM collection, and tidied them up a little. Here they are. Mostly foundry figures (so 25mm rather than 20mm), while the ballista is 20mm Irregular.
They make a nice opponent to the Early Germans I completed a few months ago. The scale difference is ok for us.