The Germino song is titled 'Rex Bob Lowenstein' and can be found on Mark Germino 'Caught in the Act of Being Ourselves' RCA APCD 6031 [1987] - a brilliant album, but probably hard to come by now. Great song too. The chorus goes:

And his name is Rex Bob Lowenstein
He's forty seven going on sixteen
His request line's open, but he makes no bones
About why he plays Madonna after George Jones

--Stewie.