Regarding FPSS, I sell the unit with the mating connector for $80ea. I have them manufactured in Australia to my specifications. The manufacture has been mfg/providing a similar unit designed for a less harsh environment for over 20-years. To date, I have sold over 500-units and to my knowledge, not one has failed when properly installed.
If you provide me a proper email address, I will send you the data sheet and you may review it. Sorry, RDC does not allow documents to be attached to PMs or I would attach it here.