http://www.vxb.com/page/bearings/CTGY/HR
I replaced all of my heims joints including the tie rod ones which are smaller and use a needle style zert fitting. All of the other heims joints have the regular standard zert fitting. Mine were squeaking all the time and once I replaced them all - no more squeaking and I can grease after every outing if need be. I tried the rubber boot covers but they kept binding up and tearing so I don't and can't use them. Lenny was able to get them to work on his and I got the idea from him at the jamboree but no luck on mine. Either way they do get dirtier now but I can wipe off and just grease again. See link above. The ones we use are all right hand thread and16mm for all the larger ones and 12mm for the tie rods. POS16 and POS12 are the part numbers. Not too expensive either and well worth getting rid of that damn squeaking!