You're gonna be hard pressed to find off the rack with those numbers! I'm the same weight but nine inches shorter. Off the rack legs were usually too long so I finally got a custom suit. Give One X a look.
Lol. I'm the same height but have 25 lbs on you. Anything that fits our height is made for a dude 250lbs. Unfortunately, custom is the only way to get something fitting proper, although I didn't try every suit mfg in the world. tall skinny guys just aren't the norm. Good luck!
Good luck. I don't think they'll work very well. I'm 6'1". At my lightest (180, about 80 pounds ago...) I could fit into a 44/54, but all of the armor was out of place because the suit was too short. For example, I couldn't get the knee sliders into the correct spot anywhere on the velcro. Nowadays I can carefully squeeze my gunt into a 48/58 as long as I don't breathe too deeply, but the armor is where it is supposed to be. At your height you would need something that will be huge on you, and the armor won't stay where it is supposed to be in case of an extravehicular excursion.
If you are going to be using a suit for years invest in a custom proper fitting suit.. The armor will stay where it is supposed to in a crash. Also once you realize an off the rack suit is not working you will have wasted that cost. I have no pony in the race but Bison, or X one, are go to guys more costly is RS taichi but with it! You get the point. just my 2¢
Son is 6’2” and enviably lean. We went custom with RST and couldn’t be happier with product and price.