These are the words I know, but I don't go any further. Can someone fill in the missing pieces?

"I bought my doggie a muzzle
So he wouldn't bite the man with the mail
They found the mailman dead on the walk
He'd killed him with his tail

"Oh, one more time around Piccadilly Circus
Driver Follow that Bus
It's a shame the way the rich folk work us
Everybody's rich but us."

"There's not much hair on an apple
There's verey little fuzz on a grape.
It's onlly the lack of a beard on a peach
That keeps it from being an ape.

Oh, one more time around Goosebury Junction
Driver follow that bus
It's a shame the way that we can't function
Everybody's rich but us."

THERE HAS TO BE MORE THAN THIS! WHO WROTE IT?