Thanks guys.
Difficult thing to sell around here, which is why I normally stick to slimlines and streamlines.
This is the first time I have been asked for a fountain for 9 years!
There is a bloke, based in York, who imports his own kits and has flooded the market with tat. He sells a finished Sierra for £5.00!
Fountains and rollerballs go for £15 to £20. 
Can't compete with that, regardless of quality.