does anyone know were i can get some handbrake cables made up to suit my needs? and any idea of cost?

Speedy Cables do all sorts of cables. They weren't that speedy but did a good job.

Depends exactly what you need, but JAG has some for sale here

Simon

make/modify existing ones - go to a yacht chandlers to swage a ferrule on the end. They are capable of standing up to much more strain than you'll ever apply to the cable.