There are some really good cottage flashlight makers. It's harder to get a 100% USA made flashlight than a knife because things like emitters and control boards are almost impossible to source without going international.
MBI makes amazing lights, I just picked up an MBI HF Ti and love it. Although not made in the USA they are assembled and designed here and a lot of the labor is here (one guy...). CS is also fantastic since it's one passionate guy running everything.
Eagletac also makes some great lights and offer Ti versions of several popular models including the D25C. I've had Eagletac lights and they are also well built, although the difference between Eagletac and MBI is similar to the Spyderco-CRK difference.
Sunwayman is also known for making some really nice Ti lights although I've never owned a Sunwayman.
Keep in mind that it will be almost impossible to find a flashlight with the same finish as a Sebenza, most Ti products I've handled have a much brighter, whiter finish and look very similar to steel, unlike the dark grey matte finish of a Sebenza handle.
The MBI does compliment the aesthetics (and manufacturing tolerances) of the Seb though, I'll try to snap a picture of the pair for you soon.