We found this new on Ebay several years ago. It's about 3 feet long. It came fully assembled, except that the masts and smokestack had to be fitted into the hull and the lines tightened. I believe it cost about $189 with the shipping. The workmanship is quite good. The mahogany looks better than painted, in our opinion.
Here's a link to another one on ebay.
http://www.ebay.com/itm/160718479182...fvi%3D1&_rdc=1
The listing expires in 19 hours. Good Luck!
The gift shop at the Mount sells a 10 inch model for short money.