Advice needed for completing build/setup of vintage 1979 Sony A system

Hi

I have gradually been building a 1979 vintage 'Sony System A' (replicating what my brother and I shared as teenagers) for my 20 yr old son, and have the turntable (PST15), Tuner (STA30L) and Amp (TAF30), and it sounds great (at moment using speakers from a 20 year old Technics mini system).

I was wondering if anyone can tell me what the correct cable would be to connect the Amp to the tuner ( I am currently using a twin cable (apologies I do not know the correct name) that came with a Sony video camera I brought in 1997.

I also need to find an aerial to use as I cannot get a very good signal using the built-in (AM ?) aerial at the back if the tuner. Again I'd be grateful if anyone can offer some advice.

Lastly I am looking for the System A tape deck and tuner, so any advice on what to look for/pitfalls to avoid for would be much appreciated.

Thanks in advance

Regards
ferric