The gnomes go up for auction after the festival ends on Saturday and Pocock says interest in them has been so high, he wants permission to make a few more as a fundraiser.
"I think they'd sell for several hundred dollars each. Couldn't you imagine Winston Peters wanting a Gerry Brownlee on his desk? I think they'd sell like hot cakes. I had someone from New York, an ex-client of mine who is an art dealer, wanting one."
Pocock says without the Sutton and Brownlee gnomes the exhibit wouldn't have worked as well. "It would just have been a pretty thing, and I didn't want that. I wanted something that was funny and people would have a bit of a laugh about."
But he says Gardner, a recent art and design school graduate, took care with the "gnomification" so the models were in no way disrespectful.
"He studied hundreds of photos of Gerry and Roger and their mannerisms, how they stood. He knew Gerry always had his Canterbury tie on and often had his hands behind his back.
So what does the minister think of his concrete alter ego? Pocock says he doesn't know but CERA recently contacted him on behalf of Mr Brownlee asking who the artist is.