If anyone is genuinely interested in one of these, there are heaps for sale in Australia, as they were made in fairly substantial numbers for the Mk 1 ACCO, but were never issued and were sold off as a big batch several years ago, NOS. Just about every decent event has one or two for sale. Given the current exchange rate, they should be pretty cheap delivered to the UK. I have, however, never seen a set of the rods, you'd have to manufacture something.
We have one at the museum to install on our Mk 1 ACCO prototype, if we ever finish restoring it (it has been moved from storage, into the workshop and back into storage several times over the years).
Cheers,
Terry