Well first of, apparently they work.
But I would LOVE to get some fresh templates, and I don't even mind to build them myself.
However, I have no clue how. Meaning, sure I can open dreamweaver or notepad and get something going,
but all I really want is a simple 1 page html with some components.
Somehow the quiz landers still work, but wouldn't it be cool to have a SaaS product (adult website builder)
that lets you integrate all the items that you want?
There are tons of products out there that do that , but not with the elements I want. (MaxMind, Google Maps, pictures, quiz, etc.)
Or is there? 
I don't think many WYSIWYG/SaaS website building services focus on our market who want these kinds of things.
I just try to save code snippets and templates but most will gravitate to outsourcing to someone who can do all this design stuff much better than themselves.
One issue with a SaaS approach is that you invariably will need to tweak little things after saving something simple, and if you are not fluent with HTML/CSS/JS, you end up in the same time sink as usual.
Muse / Google Website Designer? It's WYSIWYG and very similar to designing with Photoshop - a one-page HTML lander should take about half an hour even if you're doing a bit of animation and so forth.
You'll have to add in the MaxMind / Google Maps code afterward, though, I agree.
To answer your first question, they look the same because people don't innovate.
The reason is that even if they did, since it's so easy to spy, everyone would copy their lander by the next day. So all his advantage would be gone.
As for coming up with new ones if you are not technical, just create them in PS and you can get them coded for pretty cheap in XHTML / CSS.
I've been working on a new campaign lately and built 20+ landing pages for it and still haven't found a clear winner.
You keep seeing the same style pages because lack of creativity amongst affiliates, and the current pages work well.
throw some malicious code in your landers. if you get a winner and it starts getting ripped, at least you can make a buck off of it 
hell, a lot of rippers can't even be bothered to remove the HTTrack info out of their ripped landers.