Coolant solution Telstar 1985 AR

[Flokos]

Dear members,
I have a difficult time choosing the appropriate solution. The manual indicates an anti-freeze ethylene glycol antifreeze solution [ESR-FM7C-35C or ESB-M97B-18C] based on old AS standards(?). Presently there are for sale solutions, like ESE (second E, rather that R) M97B18-C Type A on AS2108-2004 standards, but there are others for Type B. I'm also confused if I should find just an a/freeze - a/boil, rather that a (just) a/freeze solution.
Finally, should I just stick on the abovementioned chemical compound only? I'm worried that if something else is used, it may affect the engine. Can you please assist? Many many thanks, Flokos.