So glad this thread is here, I know exactly what parts to pick up for the next time I have the tank off.
Perhaps it's a bit of Stockholm syndrome, but I find that once I've got the plastics undid enough to get the tank off, and have actually removed the tank...it's easy to convince myself to take off the airbox. So might do this job next time I put in a new air filter.
Last time I was in there, I remember looking at the rubber hose being discussed and thinking "gee that sure looks like you could swap it with stuff from the auto parts store."
Any time I can avoid ordering OEM parts whilst not sacrificing quality or safety, I'm OK with that.