Try;
Rob Armstrong Hand Built Guitars
52 Stratford Street,
Coventry,
CV2 4NJ,
tel 02476 442502
Rob makes superb instruments, and his bouzoukis are phenomenal. Roger Bucknall at fyldeguitars.com is also well worth a look. Not sure if John Hullah is still building. Stefan Sobell is pricey but brilliant, and try a search for Northworthy Guitars, who build zooks to custom order.
Tim from Bit on the Side