Kodak doesn’t provide a good comparison to Harman when it comes to how the distributors price things, because in many cases and locations, the retailers are buying from small local distributors who are buying from larger national distributors who are buying from one or more international distributors .....
Harman tends to appoint one single distributor for a country or region, and almost all retailers buy directly from them.
Like as not, consumers will never see an official announcement on specific price changes from Harman or even its various national distributors - that sort of information is usually confidential. In addition, the actual costs visited on the various distributors will vary, due to the fact that it costs differing amounts of money to ship things from Harman to the various markets.
You might see a more general announcement from Harman providing a range of expected price changes, but for most of the world the “official” document will be a confidential memo from Harman to a distributor, which in turn will bring rise to another “official” confidential memo from the distributor to its retail business customers.
In the UK, where Harman does its own distributing, there will only be a single such memo, but it probably will still not be for public release.
There could, of course, be an understanding between the manufacturers, the various distributors, some of the retailers and kosmophoto that kosmophoto is a good conduit for social media release of information. That seems to be the way of the world now - everything going through “influencers” - some of whom are highly paid to do so.