I have made the first step into having a new instrument made for me.
A new Baliset is what is required and I have contacted the 12thFret in Toronto about this. Many moons ago they (Grant MacNeill) built a six string fretless bass for me and before that had done numerous repair and setup work on my instruments. Needless to say they have my confidence and I look forward to working with them again.
These images are what my current axe looks like. It was made by Peter Tamas and has served me well for many years.