Bought a set of cheap, £20, 750 Teapot inlet rubbers from Eblag to try with the RS36's .
Lovely and supple and seem to be ok and the carbs fitted with a little grease, a small ratchet strap and a hose pick.
If you're critical, you might want to match the ports to the inlet rubbers, but there's not a lot in it to be honest.
They do place the carbs closer to the head, but there's still not enough clearance for my application.