Being that you are in PA it would probably be easier to drive down to the Blade Show in June. Mayo will be there for sure and if you can make it at the beginning you may get lucky, but Mayo has said they go FAST. He is a very talented knifemaker who is getting the recognition he deserves.
If you can live without a titanium framelock from Mayo or Onion there are a couple of other options. John Smith also makes a framelock that I am sure you could have him drill holes in the handles. Mike Obenauf also makes a titanium framelock. Both makers had titanium framelock knives that were just sold recently on the "Custom Knives For Sale Individual" for @ $400.00. The Obenauf had divot holes drilled in the handle (the holes did not go all the way through). Give either of those makers a holler and see what the wait time would be for a similar knife.
Oh, I forgot! Either maker is great to talk to even if you are unable to get a knife at this time from them via order. You might even try seeing if Mayo will customize a Sebenza for you (drilling holes in the handle), there was one for sale in the same above forum a little ago. Always worth a shot giving him a call or e-mail, seeing if he can do it and what he would charge.
Aloha!