Dry pumps used to last all winter and then die every summer when things got warm and dusty. Found that the air inlet pipe just above the footwell was the perfect size to stick a standard inline fuel filter in to. Same pump has now been through 4 years and a thousand hours or so. Just a SWAG but maybe being particular about keeping the air super clean as its flowing in to the dry pumps is the way to go.
No, I have no idea if there is an STC or any such paperwork on this. Check it out yourself before you do such..... Perhaps there is already an inlet filter on yours that just needs to be checked frequently....