Hi Vanis, and welcome to the forum.
Have you tried the snap it? I have used it in a high angle environment and found it very convenient because of the built in carabiner. The carabiner built into it is pretty small, though, so it may not be large enough for your gear. I currently own four of them (two of the original Gin-1 version and two of the new H-1 version) and I can definitely recommend them.
I can't seem to find the serrated version on Spyderco's site right now, but it's at all the regular retailers.
(plain edge, probably not what you want)
https://cutleryshoppe.com/spyderco-c26s ... n-inserts/
Alternately, you could just girth hitch a cord through the lanyard hole and use that for a carabiner?
Sal, a carabiner hole is what you see on climbing specific knives like the Petzl Spatha, CRKT Niad or Trango Piraña. It's a much larger hole than a lanyard hole. It's intended to be large enough to easily clip a full sized climbing carabiner through (often with one hand).
https://www.edelrid.de/en/sports/miscel ... esser.html
https://www.petzl.com/US/en/Sport/Packs ... ies/SPATHA
The problem is that the climbing specific knives are super low quality, so if you are actually using them to regularly cut things, they pretty much suck. They're more or less intended as very occasional use (or emergency) knives.
For what it's worth, I wholeheartedly endorse Vanis request for a Byrd climbing knife with a full size carabiner hole. I think that it would have to be a Byrd level product (8cr, made in China), because the market for a Spyderco level folder (and price point) for this would be miniscule. But if you made a $30-$40 Byrd with a fully serrated edge and a carabiner hole, I bet you'd capture the entire market segment. That's especially true if you could partner with a climbing gear company to market it. I've owned two Petzl Spathas and a Trango Piranha (I'm sure I still do, somewhere at the bottom of my gear locker), and from a knife standpoint they're basically garbage.