It's not uncommon for fork blades and/or chain stays to require a little tweaking to get them to fit into the lug socket. I'm guessing that you should be able to pinch them in a vise to shape them to fit.
Regarding the fork crown, I think that 3-Rensho crown takes some sort of special blades. I have an old Tange catalog and there is a reference to a crown they sell as taking "24 Aero" fork blades but unfortunately, I can't find any other references in the book so I can't tell you what size they should be.
FYI, check out ceeway.com for lots of framebuilding stuff. Maybe they have some other reference to 24 aero blades.
Last edited by Nessism; 03-11-07 at 11:06 AM.