Just curious ...
Do you have a need for an exit block? The turning angle would be more than 90 degrees. If your line is exiting in the same direction you would need just an exit plate. For instance, on our boat the internal halyards exit the mast with plates and turn at the blocks outside the mast at the base. That seems like the normal circumstance to me.Rig Rite does have a comprehensive selection of parts for your mast, but be prepared for their prices. I bought a new mast base block for a spare halyard. I was going to buy a couple and discard an older one that wasn't turning well. After choking on the price, I worked much harder at restoring the older block instead.