[Richard]

I think I answered my own question. I need to google for either a 75 or 100 amp switch. Progressive seems to make one for 100 amp. I did notice the original one is rated for 70 amps and not 50.

Thanks for the info Bill, the unit you mention has 65 amp contactors, so that makes sense with what I found.

I have a new surge guard unit waiting for installation. I'll put it in when I put in the new ATS. And now that I am retired and only working for me I'll paint the compartment with PORV.