Garrison or Greenwood and Ball Roman Infantry?

I picked these figures up in a mixed lot from eBay recently, and need some help to identify them. The whole lot was described as Garrison/Greenwood & Ball, and these figures do seem to match with the 20mm Ancients Range from this maker. But when I went over to the current site for Garrison Miniatures, I couldn't identify any of them.

Garrison has photos posted for about half of the figures in their "First Century Imperial Romans" range, and none of these figures is an exact match. As for the figures without photos, the descriptions don't seem to fit.

Since these figures clearly have the look and feel of vintage designs, I also spent some time on the great Vintage 20 mil site but without reaching any conclusions.

So I want to ask readers if they can help me out. Are these Garrison / Greenwood & Ball figures? If so, are they discontinued figures? How are (were) they catalogued?

Here are a few more observations on the actual casts (click on the image for a larger version):

The figures measure 20mm in height (ground to eye level). B and C are the same figure shown from different angles. D is wearing a cloak, and the upright line behind his shield may be the remains of a broken javelin. I am assuming he is a Roman auxiliary, but could be from some other range completely.

Thanks for any answers, including guesses, hunches or other suggestions.