The T-pieces are the carb end of the float bowl overflows. They don't affect the running any way, Mitch. The hoses terminate eventually behind the right-hand footrest.
I had a look in my box of spares this morning but came up empty-handed, sorry. I'll keep my eyes open, though.
I've amended my first post above as I originally thought you'd posted photos of the float chamber vacuum hoses. My mistake, sorry. Because the overflows are there to drain excess fuel away from the float bowls (like if you get a stuck float) it would be best to try to replace them or do a pukka job of sealing them with epoxy. Not a good idea to have fuel dripping down onto the top of the motor ... ;(