Here is the response from Sifam.
I think i may be able to get the AL29WF to work, but with a custom designed bezel to adapt it to the R22AF cutout.
"Many thanks for your email, I’ve attached the data sheet of the meters we can supply, if yours is the R22AF the nearest replacement would be the type AL29WF with internal LED illumination, part number, IS 14666 as 6 volt illumination, partnumber, IS 14667 as 12 volt illumination"