Seen plenty OEM 5LV used Exup cables on eBay, search in "other items" on bike breakers.
Seem to remember seeing em on Venhill site looking for hoses etc, but site is proper shite, so may not come up in the site search, just ring em up.
Got some slinky cables as a spare set, compared em against OEM cables, identical in length, only visual difference is adjusters & cable sleeving that goes down back of motor between swingarm & sump.