Found this out by accident while moving some stuff around the house I working on.
I was going to move the sculpting station to a different location but my sim had started a stone sculpture and it wouldn't let me move it. I done the moveobjects on cheat, figuring I could move it that way, and when I grabbed it I missed the sculpting station and grabed the stone block instead. When I moved the block the statue that was going to be made was on the sculpting station.
It wouldn't let me delete the block tho, all I could with it was set it down and when I came back to live mode I had to shift click the block, select object and select delete to get rid of the block.
So if you want a statue fast to complete that opportunity to deliver a statue to someone, have your sim start the sculpture then stop, go to buy or build mode and have testingcheatsenabled true and moveobjects on, move the block from the sculpting station, grab the statue and deliver it.