It would have been around 2009 - 2010 when the discussion was made to use Vesrah, as the cost of using Fowlers wasn't sustainable. I remember one of the design engineers talking to me about it. I assumed that they had progressed with it, but it looks like it was either short lived or never happened.Dunno, never known them to use anything but Yamaha. I was using Yamaha plates there in 2016, and they were still using them when it went belly up. The BOM just states Yamaha as the supplier. Cant find a buy in price for the frictions, I'll have another look later. But they were buying in Yamaha steels at £4.48 each, circa 2018.
