The plant I am in now does not have a turbine oil system and I do not recall what was in the past plants as far as mesh size. I have only seen suction strainers and not had experience with return oil strainers. I have seen systems that have had just the perferated baskets without the fabric as the suction strainers duty is to protect the pump from large particles which could damage it. So the mesh size is less critical than what your online filtration and ofline filtration/purification system is. Do you have supply filters and some form of ofline oil conditioning such as a centrifuge or vacuum dehydration system? At any rate this strainer should be repaired and I see no reason why a 100 mesh fabric couldn't be used. There may be other options as to composition of the fabric such as a cloth of some type since it would be fully supported by the basket. Good luck.