I'm one of the lucky sods who bagged a full set of these in a human size, just as SABRE stopped production.
But SABRE-made pieces does turn up once in a while on German eBay - I will try and look for some for you Mr. Duncan.
Other than that I have to agree with Steve; the Kohler sets are a fine quality though a bit pricy, and they are selling quickly I can see. They still have a good portion in stock on:
The pattern is indeed a great one, and all SABRE uniform pieces and especially smocks I own are of exeptional quality. They even made Danish desert camo smocks, many times more versatile and hardwearing then the issue ripstop and goretex uniforms combined!