Hi Darren, I think you have to stick with what you have got. It would cost a lot to rewrite using custom code. Mortons just may say it is not worth it and it is gone forever.
It should not take long to update the WordPress to include the widgets where they are needed. For example, home page, latest posts on right hand side, classifieds on home page. Classified adverts sorted out. I wrote a classified ad and it kept getting rejected. I kept cutting it down and cutting it down and it ended up as just the headline. Someone said (may have been JasonB) it was probably rejected because proxxon is spelt with two Xs.
The first thing to do is make the navigation work as previously. I don’t think this would be hard. I used to do it all the time when I built WordPress sites. But I never built anything this big. Perhapd you would like to discuss this privately.
Moderator Edit
You have been asked before not to post this sort of information.
I think the first thing to do is get screen shots of all the original pages. If you don’t have these. The way back machine website would probably help.
Then we could add the required widgets. As editor of MEW and later ME as well, I was involved with the site back when it started, probably about 2005 if I remember correctly. There were a few teething problems but they did not take long to sort.
It would be a shame to lose the site because it is so popular. I assume this is why cloudflare is so slow.
Surly a paid cloudflare site should be quicker than what it is, it takes a new post 15 seconds to update.
If you want to talk, you can message me through this website.