Here are some links to websites that carry parts for Patrols. These vendors have been around for a while and offer a variety of parts. Hopefully having this list will save some searching.
new-datsun-parts.com ; located in Canada.
abouttimespare.com ; located in Australia.
DatsunlandSoCal ; this is the website that carries rubber parts and weatherstripping for Patrols. Here are some samples: http://www.60patrol.com/forum/gallery/album.php?album_id=220&sk=t&sd=d&st=0&start=0
DatsunlandSoCal on eBay ; this is the eBay store that carries the same weatherstrip as the above link.
Datsun311Parts ; this is the eBay store for user Schluderm. There are usually a handful of parts here.
nissanparts.cc ; this is a Nissan dealership in Washington state, very helpful ordering department. They won't charge your credit card until the parts are actually shipped.
4wd Products on eBay Located in Australia. Carries wheel cylinders, engine mounts and more.
Amayama ; parts locator service for Japanese car parts.
oz4wdclassicparts.com ; located in Australia, this is our very own member Swerve. Look here for those impossible to find wheel cylinders and hydraulic clutch parts.
There are others that I can't think of right now but will add later. Of course there are always things that turn up on eBay.