You need to see if any decals are affixed to the current mast. Otherwise take a photo of the mast and post it here.
the year of your boat would indicate a Z Spar mast but parts can be obtained here on the SBo store to include mast, boom, sails, rigging, etc as the store has the build list of parts for your boat.
May I suggest going to boat information here on this site and look under. Hunter resources for the hunter 26, not the 260 and make sure it is the 26 as the owners manual has listed the 19 and the 23.5 as welll.
Photos would help. Be descriptive as you can
crazy dave