Allow me to disagree gently. I know of 2 EU suppliers who have sold far more than I ever will. I would estimate that between the two of them they have sold in excess of 500 Hooben tank kits of both types, perhaps more. A third is selling at least what I sell in the Hooben kits. Although I have no figures from Hooben directly, I would estimate total world wide sales of their two tank kits at around 800. Not bad for a company new to this vein, in less than 18 months.
The EU market is much more developed than the USA market for our hobby, and most hobbies. However, I would say it will be another year or more before Hooben returns a profit on their investment in tanks.
As for building British or Italian tanks, both tend to be quite 'busy', many angles, nooks, and crannies, and quite complicated drive and suspension systems, ergo very expensive to develop in model form, and more so to manufacture. Therefore, I do not expect to see either produced any time soon.