This size is not presently available. It is one of three sizes missing in the old Centuri/Semroc system of Series tubing. There is no Series 14 (the size you want) or Series 17 (1.70 ID/ 1.74 OD) or Series 19 (1.9 ID/1.94 OD). As you note, Series 14 would be great for 1/100 scale, 144 inch rockets like Titan and Atlas. I'd be good for 1/10 Hawk sounding rockets and for 1/64 LRB on Shenzhous as well.

But nobody makes 'em.

Yet.

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NAR 79743
NARTrek Silver
I miss being SAM 062

Awaiting First Launch: Too numerous to count
Finishing: Zooch Saturn V; Alway/Nau BioArcas; Estes Expedition; TLP Standard
Repair/Rescue: Cherokee-D (2); Centuri Nike-Smoke; MX-774
On the Bench: 2650;
Dream Stage: 1/39.37 R-7