sending unit fittings

[Al_S14]

does anybody know where i can find a fitting for oil pressure sending unit. i wnat to put it right under factory oil pressure switch . there is already a hole all i go tot do is find an adaptor for it ... sending unit is twice size of taht hole.

[the head]

why not remove the oil pressure switch it is practically useless anyways thread pitch for pressure switch hole is 1/8BSPT