Bernard Ancelle in France makes a direct replacement for the Super Maramu genoa toe pulley inĀ PETP which is very chemically resistant (particularly to sea water), does not absorb water, resists UV and has good
mechanical properties.
The combination of plastics device and stainless screws would
not be subjected to corrosion as the original alloy pulley.
And they are only Eu60 each plus shipping.
I have posted Bernard's instruction manual in the files section.