Dear AJS,
You may seek assistance or suggestion from suppliers like Omega. Alternatively, you may like to innovate, by locally constructing a drip feed lubricator. For best results, the feed should land, a few centimeters, from the top of the pulley. At the top of the pulley, the wire strands will open to allow penetration to the core of the wire ropes. This will ensure ideal lubrication as well as rust/corrosion protection, thereby increasing safety/longevity of the wire rope.
Hussam