Hi guys, grease wise a lithium complex grease with molybdenum will do fine, as you have already stated. The trick is finding extremely high load grease. Molybdenum content is important, but consider moly as the last defence- if the grease can keep metal separated for longer before moly has to do it's job then you will reduce wear.
Yes, PM lubricants do such a grease which I am happy to get to you, if it's easier Hi-tec greases are of extremely high quality and I would not hesitate to recommend them (just not keen on their oils). Hitec are becoming more popular- I believe they are available at qld diesel spares- but please check before you go.