Where to buy XS750 parts for cafe racer

So I'm looking to change the seat and gas tank of my xs750 and since I just bought this motorcycle a couple days ago and don't know anything about parts I figured I'd ask around. My goal is to make it look somewhat like this bike https://www.google.com/search?q=yamaha+xs850+cafe+racer&prmd=sivn&sxsrf=ALeKk0254ygE7sNvFKrDJgQuWJo5lKlOnw:1584161108974&source=lnms&tbm=isch&sa=X&ved=2ahUKEwiw-KqBlJnoAhWtkq0KHa2LDV0Q_AUoAnoECA0QAg#imgrc=gU3_Hi8Eblw-CM. via /r/CafeRacers https://www.reddit.com/r/CafeRacers/comments/fid6rb/where_to_buy_xs750_parts_for_cafe_racer/?utm_source=ifttt