There is a Tee publications book available from Chronos at £9.50. (see chonos.ltd.uk)
I built a lathe about 15 years ago based on an artical by J. Neave in the model engineer. I modified the design to increase the centre hight and also changed the mandrel to a Myford type standard. it was an interesting project but took me about a year to finish and probably cost more than a old but serviceable small lathe.
If you wish to contact me please E mail me at firstname.lastname@example.org. I may be able to find the artical.