Migration from SugarCRM 6.3

I have a SugarCRM 6.3 database and we want to move as much as possible to SuiteCRM 7.11.7. The Sugar installation is broken at 6.3 and cannot be upgraded to a more recent version. We can export data from the Sugar interface or can export directly from mySQL.

Is there anyone with a guide or any scripts for extract the data into a valid import format for SuiteCRM.

Key items: Account, Customer, Notes, any custom fields and data

Platform: Godaddy Linux hosting with cPanel