The Mark 1 version of these trucks included the B1600 and B1800. They had I4 engines but were similar to the rotary engine powered Mazda Rotary Pickup. They were sold from 1972 until 1979.
The Mark 2 was sold from 1980 until 1985. These models included the B2000 and B2200. There was a longbed version of the B2000 named the Sundowner.
The Mark 3 was sold from 1986 to 1993. The model names were B2000, B2200, and B2600. Four wheel drive was offered as an option. All other models were rear wheel drive standard.
Mark 4 models saw a big increse in engine sizes. The model names were B2300, B3000, and B4000. An extended version was optional, and a Vulcan or Cologne V6 engine was used in the bigger trucks. They were sold from 1994 through 1997.
Mark 5 would be the final generation of this truck. They were first sold in 1998. Their names are the B2500, B3000, and B4000. All of the same options as the previous generation were sold with these trucks, but some were updated.
These trucks are essentially the same as the Ford F-series in the U.S. You can find them all over the used truck market. The best deals are on eBay, where there are also hundreds of parts listings.