Hi Richard, your stove looks very nice in your avitar. However, if you want to do some experimenting, you can make a sheet metal 'bonnet' that covers the top and some of the sides of your stove, leaving the bottom edge open for air entrance. Make a duct outlet at the top of this 'bonnet' and run a duct to your house ducting above the stove.
This will not be very attractive, but sometimes we just HAVE to experiment !!
. This way you can see if a gravity setup [hot air rising] will work for you. If you added the factory blower you then would have a slightly-forced air system.
Just an idea to try if you are bored.