For Superman? Suspenders, arm-pit belt (as in, belt that goes under the arm-pits), plaid pants that stop at your calves and black socks in sandals If you need pointers, just look at DelBoys' vacation photos
There isn't an exact one because naturally we can't mimic the iconics 100%. The Stalwart Defender set is the New 52 paneled slimline. That with the House of El or Steel cape gets you everything but the emblem. If you want the emblem, then the House of El set is the closest (lose the head & shoulders, use Stalwart boots), but it's armored instead of slimline.
Anything from Kryptonian style to role specific gear like Kryp Command...if you are from an alternate universe where Brainiac stayed a helpful Kryptonian AI instead of becoming a evil intelligence you could use Brainiac Invader style (think that is what it is called) to show how Kryptonians merged with their planet running AI and became an enlightened Borg-like race
a man-thong,.....bunny slippers......a giant rubber nipple on his head for a shower cap......a tutu.....and Farrah Fawcett Majors t-shirt that says "Will milk guinea pigs for spare change" on the back......
Is it just me, or does it look like Soups is wearing Iron-Man's face plate as a codpiece in the second and third picture
Any style you can put the Official Superman Anniversary Emblem™ on which is no longer nor will ever be available again.