I have thought about using Cold Steel training knives. I currently use Boker. I wish Mission had a training knive since I use that knife now (MBK). Let me know how well of a product Cold Steel is.
I looked at the MBK, very nice! Boker has been around forever so I am surprised they do not offer a rubber trainer.
My tactical knife is:
However mine was one of the original prototypes made by the original designer, Dave Beck. It's a little hard to hide on my person.
"If you're gonna be stupid, you better be tough."