Don't you mean alternatives?
Dragon skin or gel 10 would be a better alternative to latex. It moves like real skin and will last longer then foam. Foam will break down and rot with in a few years. The cost to buy the skins in foam and have it rot and rip in a short time is not worth the work, time, and money on the buyers end.
If you want something that moves better and don't wrinkle when moving is to make a suit with attached separate muscle pieces or go with a silicone suit.