The above is true of so many things. In the case of pen designs like them or not, there is or appears to be a greater choice of designs within the U.S. If Penn State had a long term reliable seller in the U.K, I suspect they would do well alongside their current range, however I understand the risk of maybe having to buy large amounts of stock, for a smaller market will put all but the bigger traders off. Time will tell.
Thinking out loud it could be that as a group, somewhere in the future, there would be enough interest and buying power for a dealer to consider running with this idea. Just like the thread for pastry brushes it could lead to a strong group with strong buying power. Just saying my ten penneth worth.