sorry, the link isnt' coming up in a cordid nor youtube search but a while back there was a video link of some barbershoppers doing IYCRMM (atleast I think that was the number)
while sifting I found this which is different than the East York/Paul Bartlett chorus posted a while back...this is more of a choir arrangement, of course...not my thing but as 'someone' once said, there are no bad Gord covers
YouTube - SONG FOR A WINTER'S NIGHT-excerpt
....we just need a barbershop version of CYC, some harmonies might just be the missing ingredient