I'm in the middle of doing one, but I sourced Disks from Canada, Vented already turned down and drilled. I'll need to use 83-84 Prelude callipers for the Vented Disks.
Usually people use 84 Civic non-vented disks and callipers. If running 10" wheels the disks need to be turned down to a smaller diameter. Cant remember the size of the top of my head but can measure them for you. The adapter plates are fairly simple to make and as far as I know the same for both types of rotor, but bolt spacing is different if using full size of smaller diameter rotors. I can scan and send you the template for running under 10" wheels if required.
Another option, and if I had my way again would go this way, is David Rosenthal's
(he's on here, david rosenthal is his username) Suzuki Disk conversion. Check it out at
http://www.minisprintgt.com/discbrakes.html
Hope this helps, let me know via PM if you want me to send you details.
EDIT - Of course to run these legally on the road they will need to be approved by a Registry endorsed Engineer.
Cheers,
Dicko