If there is an Oreillys auto parts in your area, they usually have it. http://www.oreillyauto.com/site/c/detail/MMM0/08897.oap?ck=Search_dry+silicone_-1_-1&keyword=dry+silicone when you take the lower end apart, please take some photos. I can't quite tell how the lower pivot comes off the lift arm tubing. Does it just slide into the flattened area at the bottom of the metal tubing? the pivot looks very rusty from the one photo you posted. If the chain is very rusty or worn where it has been riding on the sprockets, just turn those areas to the long flat part of the chain path and put new areas onto the sprockets.