For the breather, you could always just plumb it in, or just blank off the end of the plastic breather housing (glue something in the hole perhaps?)
Which dizzy you need depends on what injection system you have, if you have a digifant engine the std 2e dizzy will work perfectly, job done.
If you have k-jet, then you need to use the k-jet dizzy with vacuum advance

The only ways round this I can think of:
1. Convert to digifant injection
2. Fit a 16v ignition module (no idea if this will have the correct ign advance map though!!)
3. Find an adaptor somewhere
4. Get the dimentions and get one made, I'm sure there are plenty of guys on here with access to milling machines