The most reasonably priced component used on the C90d 1992 (n) Japan Ha02-180 E-5 is the Pin,dowel,8x12.
The ten C90d 1992 (n) Japan Ha02-180 E-5 component parts are all listed in this schematic.
A sample from the products for the E-5 include: Cylinder, Collar 14.8mm, O-ring 14.5mm, Dowel,pin,8x14.