The other day I saw a utility trailer with aftermarket chrome wheels with hubcaps the hubcaps a had hole in the middle so that you can get to the buddy bearing grease zerks I have looked on the net but not been able to find them what are they called and who sells them. I have an older boat trailer with a odd size of bearing buddy (1820 ) had to special order new ones I would like to get these hub caps to prevent knocking another on off on a curb.