If you can get on the phone with a Fedex 'area manager' you will be talking with the right person...and you may get results!
Also, many of us here go to knife shows...for example, my wife and I hit almost all the shows on the west coast, looking specifically for Horn and Lake folders...
So, if there is any way that you can post pictures of the knives here, and we'll help you if need be, then we'll download them and take them to the shows with us.
We'll be on the lookout, and pass the images on to other collectors, and to the purveyors too.
There isn't a large market for Lake's, and if they surface, they should be pretty easy to spot...provided you have pictures, or if Ron can supply pictures.
BOL, and sorry to hear about your loss...that majorly sucks!
Mel
p.s. email with specific information about yourself and your interest in said knives...the more information I have, the more believable your story will be to me, and as such, the more effort I'll put into this. Sorry, twice burned.
--edited to add agreement with N2S's comments below....--