Hi Jerry,
I don't know where you are located. I assume somewhere in the U.S.
I don't live anywhere near the U.S so I have to guess, but I assume you can get something like that at a outdoor store or maybe a specialist gun store. If not, Ebay is probably your best option. Just find yourself a 'power seller' with a high positive feedback percentage and you should be fine.
Keep in mind that Lan-Cay is not producing any knifes anymore, so the price of remaining stock will probably go up in the future.
If you want a good M9, an USGI Phrobis III or commercial Buck M9 are always good options, but in my opinion any U.S. produced M9 will do fine. Just keep away from the cheap Asian copies.
Good luck!
Best regards,
Menno
The Netherlands