Gundam Werewolf manga bringing another SD exclusive suit to a side story manga, the Gyan Kai. The protagonist suit is the Gundam Mk-IV. Hopefully we see this Gyan variant in the future! :
Kidou Senshi SD Gundam Mk-IV Special - MyAnimeList.net
SD Gundam G Generation 31 Orx-012 Gundam Mk-iv for sale online | eBay