Yes, that's what I meant. A pre-made liner for SYK/SWK/Busse models that will fit the Spec ops sheaths, as the insert for the various models is basically the same only categorized into long & short. That way there can be a lot of interchangeability for those of us who own multi versions spec ops sheaths in different colours etc.
Yes, the insert are held by a screw at the bottom, but I think it shouldn't be too hard to drill a hole on the bottom of the insert, right LF?
If it's too hard or expensive to produce, maybe you could get a bulk order of their long & short inserts from Spec Ops, and simply mold and sell!
Cheers,
Jack