rick221
I am a former Beneteau, Catalina, Hunter, ComPac, MacGregor,Preision and so on dealer now retired but mostly Hunter, Catalina and Precision. Also I was a reconstruction expert/investigator for insurance companies.
The mast broken in half, if there was a sleeve that exactly fit the inside of your mast, then possibly it could be sleeved but there isn't. I believe the mast you had was a Kenyon isomat but they are long gone and without going into it, I would research Charleston Spar/Sparcraft or go to sparcraft-us.com
If you look on the website and call them, see if they can reproduce that mast. Also you may want to contact Rigrit (not sure of spelling) as they represent Sparcraft and specialize with Hunter masts. Otherwise you will have to build a mast and may have to either be able to use the standing rigging the way it is, or have to replace it/reconditition it to fit the mast. Sparcraft is located in Charlotte, NC
Use of another mast made by someone else, you will have to replace the mast foot.