Template Monster is probably the best place for professional looking html templates.  You can buy a funky header, insert your product and copy, and go.   For the price tag, it’s a great way to get a great looking end product. 

I’ve personally used Template Monster for a number of products (for myself of course – my web design clients get totally custom designs – i only wish i had that kind of time myself!).  

One suggestion is to look at changing the theme or stock photography for a totally different feel to the design. Something that’s themed, say for construction, may also work for architecture or real estate with a different lead photo. 

Want more tips on landing pages?  Check out   IM Myth.  It’s free, and it’ll change the way you think about affiliate marketing