This has been true ever since Vifa became available for the diy market, I think. At least in Germany and over here too local distributors have played quite a role to establish that. So essentially Tymphany is continuing an old tradition there.It is usually the case with Tymphany that they still produce a driver but with minimum order quantity. If minimum order quantity is 50-100 pieces it is effectively discontinued for diy purpose.
I can only hope it will be available for purchase by piece but i really doubt it.