i don't know if thats the case. I think it's a 3 possibility situation
1: if they happen to have a knife of it's description in the shop, they could fit it up and send it out to you
2: they might have another knife or knives of similar description (sfno) somewhere in the shop that they could replace it with, something of similar initial sale value. (if you were okay with it or asked for something similar)
3: shop credit towards a knife of your choice. you could have them custom make something or you could buy a production blade, but each price will be the normal price.
the issue I see being a problem with what gerberblades said is that if you had them make you a new one - they would be making a fully custom blade, building it from the ground up. thats custom shop, wich incurs custom shop times and prices. the warranty is to be replaced for a similar or equal price, not something thats 2-3x the production value.
maybe I'm wrong, but thats how I've always thought it was. busse doesn't technically deal in secondary market knives, and they don't really keep a back catalog of models. once something is out of production, it's gone unless theres a crate of unfinished blades sitting somewhere, or a sellection sitting in the custom shop waiting to be done up. when an older model breaks, you get a newer model or shop credit.
edit to add: I don't think busse is producing old models, I think their using old blanks from the initial runs. If I remember correctly thats the case with the silent knights, they were in a crate somewhere in the shop. the only knife I can recall that was a remade old model was the 3/8" thick sjtac - and that was hand cut on a bandsaw, made from the ground up in the custom shop.