If I was you,I would stick to nomad pods there prob one of the best pod's you can buy!I wouldn't go buying any other's! universal one's well be crap and I'm guessing they won't fit well!
the only other route is buying an oem a pillar plastic, and fibreglassing your own pod onto it; filling and spraying; 52mm drain pipe works well. I aim to do this at some point; at the moment i've got my gauge in a fibreglass pod infront of the gearstick angled towards me. I covered it in fake leather to make it look oem