I also have read somewhere some excellent grease based on teflon. I think it is made buy Dupon and its brand name starts with a K. Do not remember.
I feel your pain, really I do. I spent my summer wrestling with this.
If you haven't already be sure to read and fully understand Fergy's fabulous rear spline lube procedure, it is very informative and has pretty much all you need in order to disassemble and reassemble things..it's the sourcing of the parts that you will need some help with if and when you find red dust back there like I did when my bike died in May.
The Honda Moly 60 is what you want for the lube, BTW, but I assume that any brand would work as long as it is 60% molybdenum disulfide. It has a completely different feel than the stuff you get at auto parts stores, those have a moly concentration way lower than the Honda product.
I was able to buy a complete rear wheel from a fellow forum member for $150 so after I swapped out the pumpkin (the rear drive unit, on the left side of the wheel) I still have an almost new tire, decent brake shoes, and a slightly pitted wheel that I can try to refinish to swap out my my other, not nearly as pitted one, when it comes time to do a brake job.
If your driveshaft coupler doesn't have to come off that it s good thing, I spent a good amount of time wrestling with the circlip inside but was finally able to not only get the old worn coupler off (those Klein pliers are worth their weight in gold) but I eventually got a replacement coupler back onto the shaft, too, once I realized I had to lift the driveshaft so the clip wouldn't keep falling out if I couldn't get it attached (once you get in there you will see what I am talking about).
I spent less than $200 for parts but because I had no garage and was at the mercy of daylight, weather, and the pressures of work schedules it took me almost three months to get it going again. If the parts you are looking for aren't available right now just wait, they will be. I got what I needed in less than a week once I started looking.
If you have any questions please let me know, I just finished my ordeal this weekend and it is all still very fresh in my mind, and I couldn't have done it without the help of the other folks in this forum. Good luck with yours!