You are correct Rodger......unobtainium! I have had a look as well. There may be the odd one in a packet on a shelf somewhere but not easily available. I was waiting for you to come up with an alternative for us 😁.

There are a number of reed valves available for other engines but I don't know of a direct replacement sadly. They are not that expensive generally and it may be a case of finding something close in the same gauge material and trimming it to size? Fortunately, at the moment, mine still works, so I am in the "if it ain't broke, don't fix it" group. Not a big help but if you do come up with an alternative that works, please let me know.