Theres actually only ONE Hightech Pistol Smuggler in the Game and hes in the TG Canyon, near the Entrance to the TG Faction Office.
List:
TL15 HEW Lightwand L77X3
TL18 Tangent Substandard Pulselaser Pistol
TL24 Unlabeled Chill Freezer Pistol
TL34 Street Model Welder Fusion Pistol
TL46 Ryker Glare Laser Pistol
TL51 A&W PP183K Plasma Pistol
TL57 Unlabeled Sunray Pistol
TL65 HEW Jordan Special LP-82A
TL71 Fusion Pistol
TL74 Raygun Pistol
TL83 Ryker Atomfist FP_V26 Fusion Pistol
TL86 Blacksun RP-97
just an Addition: all 2 nonrare Plasma Pistols (TL51, 68 and 80) can be bought at the HEW Store at MB. The Hightech Pistol Ammo Vendor got them at the bottom of the List. Im not sure where to get the TL64 Tangent Pulselaser Pistol and the TL92 Tangent Assault Pulselaser Pistol. Im not sure the TL64 is ingame actually. Im sure of the TL92 actually (using it myself).