Quite pleased to find this company so in case it helps anyone I had this price quoted for me for Acme (Trapezoidal) threaded shaft.
http://www.huco.com/products.asp?p=true&cat=327
ISO Metric Trapezoidal threads (DIN 103)
Material: Steel C15
1 pcs 107640110 Tr. 10 x 3 1500mm long £5.34 each. 2 pcs in stock
1 pcs 107640116 Tr. 16 x 4 1500mm long £8.91 each. Delivery 3 weeks
+ carriage and packing extra at cost
Please note min order value £30.00