Site is made with Flash, hence only limited right-click options. Copy, paste and crop is the only answer unless you can unscramble flash files, or the site owner is willing to send you a copy of the image.
The site is built that way to prevent people doing what you're trying to do: it's called copyright protection. Please don't try and get round it - it's not fair on the owner of the copyright who has a right to be paid for his/her pictures. I hope you get a response to the email you've sent asking for them.