With you here man! When it comes to a NN-3-pin leather/composite boot, there is no replacement for the Norwegian-welted sole in my opinion and experience. I have seen/read/viewed evidence of EVERY current-model glued 3-pin BC-XCD boot coming apart- after very limited use. And- despite the build quality of Alfa and Crispi- I doubt VERY much that the Svartisen 75mm and the Quest Advance 75mm will prove to be any more durable than the 3-pin offerings from Fischer/Rossi/Alpina.
If I could have tried on a boot like the Antarctic- when I first gave NNNBC a serious try (some 12 years ago)- I probably never would have gone to NNNBC.
In the Canadian market- welted 3-pin boots are INCREDIBLY difficult to find.
The above post mentions MEC, which is an amazing company- precisely because of their excellent customer support and return policy- easy to order, easy to return- if the boot construction fails, they will compensate the customer- even if the manufacturer won't warranty the product. MEC= customer service excellence.
BUT- MEC don't carry Crispi, Alico, or Andrew boots- SUCKY.
I am VERY reluctant to order expensive boots internationally because it so damn expensive to return them if they do not fit! At least one can order boots directly from ANDREW, based on your actual foot measurements. I have a pair of custom-ordered Andrew logging boots- with a welted sole(!)- that are the finest made, most comfortable and durable work boots I have ever owned in more than 20 years of working in the woods- plus you can completely replace the sole!
Unfortunately- despite NAFTA- ordering boots from the US is a serious and expensive problem for Canadians- otherwise, I would try ordering Crispi boots from a US retailer.
The Alico Ski March surplus boots are cheap enough that they were worth the risk!
The other thing about your Antartics is that you can actually replace the sole!
My current Alaska NNNBC outsole is getting near the end of its life I suspect (4 seasons; 150 days/season)- the leather and uppers are in excellent shape and are going to outlast the sole.
Even if one could replace a NNNBC sole, it might prove more expensive than completely replacing the boot...