Thank you to everyone for all the quick replies!
That would be a 95 mm block. Not very common. What type of block is it?
Right now they only make a 90 mm (unless this is a snatch block) and it's not something so easy to machine. What are you using them for? I've found good prices on the 72 mm blocks. These would work on loads to 2000 lbs. They make singles, doubles, and triples. Pretty good bang for the buck these days. On a 35 ft boat 72 mm is still plenty of overkill.
They are for our jib sheets
Cost wise, I might consider replacing them with a smaller block as the sheave replacements
look like they are going to be over $200. (Darn. I thought this was a simple go to the store and move on to the next item on the "to do" list kind of project
Patrick- thanks for the link to zephyrwerks. This would give me the option of keeping the original blocks as I don't know anyone with a lathe. They look like a great company and love that they have their prices on line! The pricing and turnaround time seems quite reasonable for custom work. Even if I do not go this route
, I hope somebody else will find this thread and be able to use them.
Thanks again everyone for your help.
Now, decisions decisions.