TBH, I've never bothered including Business Time lyrics on the site for the very reason Dan said. They change (like many of their songs) the lyrics every time they perform the song.
Each version I have of it is noticably different.
Best thing I can suggest is to pick the version you like the most and either write it out yourself or sing along with it till it sticks in your head
Mind you, chances are after doing either of the above you'll be pig sick of the song and never want to hear it again. Thats pretty much how I feel about Business Time now
It was never one of my favourites and I've heard it so often and had to write emails regarding it on many occasion I am fed up with it. I no longer play it