Republican Roman velites are probably your best bet. I believe Victrix's come bundled with their legionaries, so you would need to buy about 60 figures to get the 15 or so velites, and I'm not sure if they all have wolf heads/pelts. Agema have velites on their own sprue, but I think there's only one wolf head and pelt per two figures. I think Agema are on the slighter side of 28mm plastics along with Perry, so I imagine they'd fit fairly well together. Victrix tend to be bulkier.
There may be fantasy stuff that fits the bill too, but nothing comes to mind.