I've been through the tyga site before and couldn't find several of the things I need
just send them a mail asking for the parts you can't find.
The outer bearings on the crank can be changed by a specialist. They are the most common fault on a crank anyway.
This is economically feasible. I had it done and its running for the second year now.
There is a gasket set on ebay. Nobody knows it. Buy it and tell us about it.

You can also use the partsmanual and make your own set. I did that when my crank failed after 12minutes of ownership and no previous NSR (or crank) experience.
In the end Honda can supply all the parts

maybe http://www.davidsilverspares.co.uk/ is cheaper than Honda
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom