Tannerma2002 may be correct that there is no Haynes manual. That could actually be a good thing
BUT, I have found the MX5 enthusiasts manual by Veloce Publishing to be a superb help with the 323F. I own a MX5 too

well its my wifes honest! and the similarities are startling, its the same engine albeit different orientation, and brakes, bearings are very very similar.
Obviously the roof and rear wheel drive mean it isn't totally relevant but
to be truthful the book is fantastic at preparing you for all sorts of jobs on all sorts of cars.
Best £20 I ever denied a rip-off garage!! It has saved me a fortune on both vehicles.
If you have a particular job in mind, reply here and I will compare the book with the 323F on my drive to see if it will help you.
There is a 1.6 and 1.8 litre version of the book here:
http://www.mx5parts.co.uk/product_info. ... ucts_id/30