Why stop at just ONE clone of Mike...why not 100's or thousands? That way we could each have our very own personal Mike Rowe to sit next to us when we watch his show and laugh along with us. And he (they) can tell us what to type on the message board so the original Mike will be totally confused when answering himself!
This is like that question as to whether he would bring himself home to meet his (supposed) daughter. Although he did say then he would like himself as a friend, he didn't think he'd be good enough for said daughter.
Actually, the whole thing is a great idea! Just think, Mike...with Mike clones you could just pick one to fill in for you on days you'd rather sleep in, or hoist a few at your favorite dive. You'd still get the credit for the work (and, more importantly, the paycheck!) but you'd have none of the aggravation or aches and pains of doing the actual job.
Mike Rowe cloned would sound like Eric Cartman in stereo.
NOLA
"I'm sailing away, set an open course for the virgin sea, Ive got to be free, free to face the life thats ahead of me. On board, I'm the captain, so climb aboard, well search for tomorrow on every shore, And I'll try, oh lord, I'll try to carry on". Sorry, I couldn't help myself. Pardon this silly interruption.