I found an older (probably 7+ years old) version of what looks like the KnifeKits model 18, KKFOCLP. The holes look like they would line up and fit on my Tenacious. My other Spydercos (Dragonfly G10, and Sage I have wire clips). The holes don't line up on my Mini Dejavoo, Kershaw Chill, and Kershaw Half Ton.
One thing you might consider if the screw holes do not match is to drill and tap your own holes to mount the clip. I've done this to a couple of mine. On a few of them, it took a little more planning so I could thread into the liner and still leave the thong hole clear.
Ever though of making your own? I've seen some tutorials on making your own clips, then hole spacing wouldn't be and issue.
Do you have a specific knife in mind?
Ric