Looking for help on High Voltage Power Supply.

Requirements are:
Output 10-300 Volt/400mA
Adjustable voltage and current (CV/CC)
Display status on a LCD by means of a MCU that will control the P.S. as well.
Power from 240Vac line (or lower DC if SMPS is used).

Initially started on a linear power supply but power losses are too much and I reject this idea. So turned to SMPS design but could not find proper parts for the above range of control. What I would like to create is this basically http://en.bjjunyi.com/products_detail/productId=21.html

Any help, ideas appreciated.
Ioannis