I did ask David Silver recently if he was intending stocking Yamiya seats and covers (foams too) and he said that because they have the Honda logo on them, he is prohibited by Honda from selling them.
He joined the SOHC.co.uk forum, at my request in January this year but I think he backed off commenting, which is a real shame after my efforts to get him on board. He asked me to get sensible lists together of questions we needed answering and he would answer via me, which he has done for us on SOHC.co.uk and we can do here too, if anyone is interested. Any particular parts that Yamiya sell for us to ask him if it's possible to stock?
I will ask him again about foams and seats/covers. Perhaps he could get Yamiya to supply, less HONDA logo and then sell a stencil to print our own logo.
ChrisR told me that the original red foams were a multi block construction, with a harder foam where the 'ducktail' hump is. (Steve posted a photo of this 'original' foam recently). I have also seen comments that the shape of the Yamiya seat never quite looks the correct shape as the original. I wonder if anyone could produce a one piece red foam but with a harder part in the 'ducktail', in order to reproduce the original shape If anyone did manage this, would the Yamiya cover still fit OK?
If you look at Vic Worlds ebay feedback, you will see that at one time he was selling off quite a few new K1 covers and foams, so I guess, like me, he used a new K1 seat as a donor for the pan/trim and strap for his restos. he possibly uses complete Yamiya seats now
Cheers ...AshD