Richard Ha, of the Hamakua Springs Country Farms on the Big Island's NorthEast shore, restored a sampan and uses it on the 600 acre farm

Chefs of the Hawaii Regional Cuisine have been given tours of the farm on the sampan bus, seeing the hydroponic lettuce and watercress operation, seeing first hand the sustainability farming of fresh, locally grown produce 

Now it's getting restored and improved for safety

He bought this sampan bus at auction a few years before 2007. There were seven or eight of them for sale that day. This one, which had previously been owned by the Lyman Museum, was the most authentic.

The Lyman House Memorial Museum offered tours of Hilo starting in 1988 with there sampans

This Plymouth was one of 8 for auction in the early 2000s, and went for 8k

https://www.hamakuasprings.com/2007/03/chef_peter_merr/

https://www.hamakuasprings.com/

https://www.facebook.com/HamakuaSprings/

https://en.wikipedia.org/wiki/Hele-On_Bus