I've used an Ebay firm called Torques_uk and made up my own hoses using fittings and hose bought from them.
Their prices are really good and they supply stainless, aluminium as well as plated steel fittings. Their fittings are good quality, really well made and finished. Assembling the hose is fairly easy and they provide instructions. Delivery is rapid too.
I've no connection with Torques_uk other than as a very satisfied customer.