i have 1978 cb400t was wondering where i can find out what other bike parts will fit it

i will post a pic of my bike tomorrow first night on. i have a cb400t 1978 that i have alot of ideas that i want to do to it. first i bought bike with clubman bars i made a cafe seat from my stock seat pan that looks pretty good for my first time, i took of the rear fender and big taillight put leds for running/brake but i want to get 2 to1 exahust and a tank like the honda dream or the honda 350 i like the knee dents, but i have no welding expierenceso need something that bolts on .... any infi what tanks that might work with mine thanks all