Got a leaking monobloc sink mixer, has pin pr ick hole on underside of spout. Happen to have a new mixer not used on a previous job, but tails are M12 not M10,so want a pair of M12 500mm flexi hoses, SF don't stock them,neither does competitor,& three plumber merchants don't have them. Why so hard to find them.
Probably because they are not often asked for. No demand = no stocking !! You can get them on internet,but I am sure you already know that !!
Had a good rumage in workshop,did find a pair of chrome hexagon nipples,so will join two 300mm hoses together as a temporary bodge.