Where have all the 665 D Clarks gone ?

[Coconut]

Hello ,From the great white north We purchased a 665 D Clark . I don't see many around here in Ontario Canada. Any time you here talk about Clark it is always 664, 666 ,667 668. Can someone tell me why this is. Is there something we should know about this skidder? Any comments in this regard? Thanks !
 

[Riwaka]

The skidders are not built in the same volume as cars. A 665D is not a new machine, older machines have an attrition rate.
http://www.alliedsystems.com/pdf/Ranger/Operators/R6405.pdf   665d operator's
http://www.alliedsystems.com/pdf/Ranger/Parts/R6525.pdf   665d parts