The Citroen-Kegresse P28 resin kit is now available from Retrokit in 1/72nd scale. This is kit number R72060 under their Retrotanks line of military vehicles.

Initially a limited released under the Minitracks label, the resin patterns have been significantly reworked with a different parts break down. They also have been improved for accuracy with additional reference material found since the original release.

But you say you haven't heard for the P28? Considering that fewer than 50 were built, most of which spent time in the workshops for repairs and modifications, that might be the reason why. Three were confiscated by Uruguay, one of which survives to this day. Those in use by France appear to have been used against the German Blitzkrieg. Perhaps not the most notable half-track to add to your collection, but surely one that will make your friends wonder what it is.