There is actually a better solution to solving this problem which has already worked. Use distributors and operators as "your voice". They are a better "medium" including response of tech issues related to code. Several distributors are REALLY GOOD at customer service for private collector sales relations as an interface with Stern.
Stern actually does listen when they start making a lot of noise and order sales drop due to complaints, including things like quality control as well.
Even today over 60% of complete sales are still going to operators worldwide, many which pass through less than 10 major distributor hands in the USA.
I cannot speak fully for countries internationally, as I do not follow Europe, but this does apply to Canada as well.
This takes some of the weight off the consumer.