New DS owner needs some help

Hi everyone!
Been reading for a long time waiting for my first Daysailer and I finally got one. She a 1967 hull number 16025 (according to the title) sail number 2872
She's In Very good shape and has been rigged for racing with what I have been told is a Proctor D mast. The issue I have is the mast heel. The halyards run inside (3) and come out the bottom. Of the three sheaves one is very badly corroded. At the top of the mast the main halyard sheave is totally frozen. I need to replace the heel and top.
Do any of you have a source ? I've looked a Selden but I'm not sure what to buy. D&R doesn't list them unless I overlooked it. I've jury rigged the halyards for now so I can sail but would live to get it fixed right
Tom
Been reading for a long time waiting for my first Daysailer and I finally got one. She a 1967 hull number 16025 (according to the title) sail number 2872
She's In Very good shape and has been rigged for racing with what I have been told is a Proctor D mast. The issue I have is the mast heel. The halyards run inside (3) and come out the bottom. Of the three sheaves one is very badly corroded. At the top of the mast the main halyard sheave is totally frozen. I need to replace the heel and top.
Do any of you have a source ? I've looked a Selden but I'm not sure what to buy. D&R doesn't list them unless I overlooked it. I've jury rigged the halyards for now so I can sail but would live to get it fixed right
Tom