No worries Bushy,
That's the only way of getting in touch with dodegy, now that he's left ODK.
The aftermarket P/Nos were really only for completeness; in case anyone ever finds a set and wonders what they fit. This way a Google will find that info, once their spiders have picked it up.
These mowers are getting a bit elderly [early 1980's for the last of them], so no longer worth anyone's while to stock parts. Much the same as older Victas - rubber snorkels and G3 carby bits have disappeared from the catalogues, in the past few years.