If you're going to fit the calipers you'll have to work out what the thread is in the caliper and how long you want to hose to be then get them made.
I opder the ends and a length of hose and make them myself, that way you can get just the right length of hose as there really is no other way of doing it properly.
If they're too short then you'll have problems with snapping the hose and if they're too long they will probibly rub on either the tyre, body or suspension etc etc (which should fail the MOT)