HP 97 AC Adapter/Recharger Replacement

[zixingcheche]

Hi,

I have a question to check, it is about HP 97 AC Adapter/Recharger.
as the service manual described:

For VIN=230 Vac. VMIN=VIN/21.10; VMAX=VIN/15.65
so, when @220VAC,
Vin Max = 20.18
Vin Min = 14.97

I have a 50-year-old HP-83059A (8V 3W max)
and I want to purchase an AC Adapter/Recharger @220VAC for NEW.
but the 8VAC convertor is hard to be found. and 9V 12V is easier.

would you please give me some advice on the specification of the AC-to-AC convertor?
I mean in NEW AC-to-AC unit for the original HP-97 calculator. Thanks!

BR,
bai