Sailboat masts can work but you should do some sketches to scale before you go that rout. A sailboat mast profile may be out of proportion to your boat.
I know of people who have removed the stock mast from their boat and replaced it with a custom mast or perhaps a radar arch. The stock mast could be a good replacement mast for boats like yours. For example the couple we boat with on occasion replaced the poorly designed stock mast on their lobsterboat with the mast from a Grand Banks 36 Europa.
Hop Car's suggestion of replacing the rotted section of your mast with a new section is a very good one if a wood mast works for you (it does for us). But..... you want to make sure the proper wood is used and the splice is more than strong enough to take the strain and load your mast is subjected to.
This is probably the course we would take with our mast were we in the same position you are. I think a sailboat mast of the height and strength we need would be out of proportion to our boat, and the cost of fabricating the fittings we would need on it would, I think, greatly exceed the cost of having a new wood section made and scarfed or otherwise attached to the sound section of our existing mast. (See photo for mast comparison between our boat and a Newport 30.)
This is assuming your wood mast works for you. If you need more load-bearing capability than you have now then going to an aluminum mast at this time could be beneficial.