If I had to guess, I would say you would simply have to modify the gloves and boots to reflect the physical traits of a Trandoshan. Two fingers and a thumb on hands and three-toed feet. I think backhand armor and armored spats would help immensely.
I would think you could start with reference images of Bossk and then add Mando elements to the outfit. The closest concept I could find for a kitted out Trandoshan would be the Trandoshan Elites from Star Wars: Republic Commando.
Just tossing some ideas out there for consideration. I would love to see how it works out.