Another potential source:
Vintage Distributing, LLC
www. vintagedist.com
I've recently ordered some rice paper inner sleeves as I had run out of my stash of VRPs. I contacted several of the vendors listed in the posts above, including Vintage Distribution and requested for samples of the rice paper inner sleeves, outer sleeves and Japanese reseable outer sleeves. The samples supplied all varied slightly from one vednor to another. So don't think you are getting the same thing from all the vendors. I ended up purchasing my inner sleeves from Bags Unlimited, but will be ordering the outer sleeves from Far West Record Supply.
FrankC