Dan,

Here is a shop that can rebuild yours.

http://www.applehydraulics.com/shocks.htm

Kind of pricy though.

Are your shocks locked up, or are the shaft seals just leaking? If the truck was driven much with dry shocks, the mainshaft may have been ruined rendering them unrebuildable. Hopefully the seal is good and you may be able to cycle the pistons several times and purge out the contaminants in the reservoir.

Paul


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures