From my research on the message boards here, I found out that people recommended to just bite the bullet and buy the linkage seals from a reputable vendor.
They're not that expensive, and they've been tried and tested. I'm pretty sure that Subtech, Thor, and Subconcepts carries ready-to-use seals.
I'm no expert, but I think that running 1/8" rod over 1/16 would allow for better seals, and Skip's units use a nice high-sealing, low friction product.
I was toying with the idea of building my own seals at the beginning of my project as well, but a real small amount of cash and a little time for delivery let me concentrate on the fun part of scratch-building the hull nicely.
Just my two cents worth.