In the 1930s here was published/broadcast a series of short selections, some fairy tales and some Aesop's Fables, all Spoonerized: My Tale is Twisted, by Col. Lemuel Stoopnagle (pseud). (The practice was modernized decades later by political satirists The Capitol Steps - they called them "Lirty Dies"...but I digress.)

Only a couple of years ago the Stoopnagle volume was re-issued and is still available - see http://www.stoneandscott.com/humor.asp. Your local library may have it too, or be able to get it for you. "The Mion and the Louse" and "The Pee Little Thrigs" are classics.