Purchase of convertor, auto trans switch, surge protector

This will do the job if all you want is a replacement that actually works like it is supposed to. I doubt you need a 65 instead of this 55, but they also have a 75 amper.

https://www.amazon.com/PowerMax-PM4-55-MBA-Replacement-Converter-Distribution/dp/B075JRR1FJ/ref=sr_1_7?ie=UTF8&qid=1539108982&sr=8-7&keywords=PowerMax+converter

A 50 transfer switch is available here

http://www.bestconverter.com/Boondocker-50-Amp-Transfer-Switch-BD-ATS50-The-quiet-one_p_437.html#.W7zyfVKWxLM

The manual for it is here (AFAIK it is the same unit)

http://host.aws60.com/~powerma84jsdoer/wp-content/uploads/2015/10/PMTS-Install.pdf