Build Gallery challenge

[ptrk.mj]

I would like to grab images from thumbnail gallery. There are a few problems:

1) Thumbnails don't link to images directly. Instead they point to simple web pages containing those images.
2) Links in thumbnails contain random string.
3) The site has anti-harvest measures implemented. Too many requests in a short period of time result in IP ban.

Links inside thumbnails have the following format:
http://example.com/bla-bla-bla/#.html

Image URLs have the following format:
http://server:port/yada-yada-yada/#.jpg

Can you help me out?