The following supply 2.4mR sails:

 

Banks Sails  
       
    This email address is being protected from spambots. You need JavaScript enabled to view it. This email address is being protected from spambots. You need JavaScript enabled to view it. 
    North One Design Europe  
    This email address is being protected from spambots. You need JavaScript enabled to view it.  Super 3 limited can supply North sails and  Sanders 2.4mR Dacron club sail