Consider this alternative approach.
I understand that you are interested in releasing patches for program 'Y' to enable it to run on the Iyonix computer.
As publisher and copywrite holder of 'Y' I am very interested in upgrading this software title to run on the latest versions of RISC OS running on the newest hardware achitectures. Thus I am pleased to hear that there is still enthusiasm for product 'Y' within the RISC OS community.
Could you please contact me within two weeks of the date of this communication with a view to arranging an official release of the 32bit clean version of 'Y' so as to avoid any potential infringements of copywrite.
As regards paying upgrade fees I don't think that there are many who would disagree that an upgrade fee is reasonable for conversion to allow a product to run on RO5.
If a user has paid monies to make sure that the product will run (properly) on their new machine then they expect it to work in exactly the same way as the older version of the software. I have had at least one experience where this (still) appears to not have been the case.
If software houses had reacted more positively and clearly about the Iyonix when it came out users would not have had to start thinking about hacking programs to get them to work.
It would also have made it clear that those software houses were committed to the whole RISC OS desktop market instead of only one part of it.