Since about 2011 John Deere no longer markets any loaders for tractors older than 5,6,7 and 8000 tractors. Power Beyond kits are still available and someone also is machining a block and selling them on eBay. I have some friendly salvage yard operators that save them for me when they kill a tractor that has one. The joy stick 2 and 3 function valves are all gone, (JD), but would assume Koyker can supply all that with a new loader. I have not installed a new Koyker of their JD copy's but all parts are supposed to interchange. There are several around being used.