fphe install

What type of fittings are you guys using to install a heated filter or fphe on the MBZ 300SD?
I would like to find a 5/8''(oem hose approx. i.d.) to 1'2'' reducing 't' because my fphe has 1/2'' npt holes.
Of course you don't know me, but I spend my life searching for things that don't exist.And heres another one.
Any thoughts or ideas would be very much appreciated.

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