Oil temp probe fitting

[Mac Transtrum]

I am working on plumbing FWF on my Gee Bee and trying to locate this fitting or build one. The one in the picture is on a 450 Stearman and has two threaded holes for two temp probes. Front and rear cockpit instruments. I would only need one. The tube is installed inline on the oil line from the tank to the engine. Questions 1, does anyone know a source to buy one or 2 it doesn’t look like it would be that difficult to make one, but does anyone know what that fitting looks like on the inside? I assume that it is open on the side by the probe to allow engine oil to flow by the probe, but you know what they say about assuming things.
Thanks!

 

[Morphewb]

 

[Mac Transtrum]

 

[ndlakesdreamer]

 

[Melndav]

 

[bigblackmastiff]

 

[Mac Transtrum]