On my Maramu #258, the 12 volt main mast furler motors are made by Cima in Italy, but are no longer available. Best to keep fixing what you have. Amel can supply a LeRoy Sommers replacement, if needed.
The Bonfiglioli gearboxes actually call for gear oil, not grease, but I still think the grease nipple is a good idea.
Bonfiglioli gearboxes are easily available from Drivetech Automation in Sunrise Florida. Contact Mitch Silverman at "msilverman at "drivetechonline" dot "com". He is very responsive.
s/v Have Fun!
1989 Maramu 258