Glenn,
Try waclighting.com.
It is a pretty good sight.
Also track-lighting.com.(include the dash).
The installation instructions for a recently purchased set of button lights(hockey puck?)to illuminate the interior of kitchen cabinets direct you to use the supplied wire nuts to make the interconnections. No box required. I will surface mount the fixture on the inside, drill a small hole for the wire and splice above the cabinet(no soffit), running the lv wire across the top front of the cabinets to the next fixture.