Peter, here's my start. It's been tough sledding; I would say this is at max maybe 75% accurate, maybe. I'll be sending you a PM.

Out in the outhouse lived Mr Cheesymouse, a most extraordinary fellow
He is forty years but the greatest sex appeal is, oh they say his tail is cheesy yellow
One night at nine when at supper time, he goes to dine in the ?lladaa??
Of Ms. Froggysmiths farm
He nibbles at the cheese without even a breeze, set it alone from the table
Cause Ms. Froggysmith's able
For she's stinking rich, daughter of a bitch, never been itched
Which is understandable
Cause she's can't stand-able

When he's had his fill, Cheesymouse takes some trill meant for the budgery call
Then to wash it down he drinks some milk that he's found, he sleeps in the biscuit jar
But by ten thirty, he's awake and alert, he can't stay a night while he camps there
Ms. Froggysmith's hamster
So he's under the door, creeps over the floor
He's got to make sure he's to touch
By Ms. Froggysmith's barn bird
While in the next room, Ms. Hamster's in a swoon
Dreaming of a honeymoon
Soon there'll be a rodent's wedding
And double-store bedding

See updated lyrics below