I usually have you training with Sharkee training knives like the Daggers, Tantos and Tactical Open Folders.
You can get the Daggers from here for about $15 + shipping.
Amazon.com has the same (black) Daggers here for $17, including free shipping.
Get some 1-sided felt from the craft store (Sharkee calls this “VirtualBlade”) with some sidewalk chalk and you’re ready to rock.
Apparently the red Daggers are not readily available anymore.
If someone knows how to tie paracord handles, I have 100 feet of it here…