Sorry, "local" for me is the Virgin Islands. I did have Annapolis rigging make up the thru bar for my spreaders; he was very helpful. I didn't want to reinvent the wheel here in the islands, and they had a "kit" (including the rivets) ready for me when I was at the boat show... showed me how it should be installed on a section of mast there in the office. I just had to tell my guy what to do....