I downloaded it a couple of years ago from the Polish Konradus forum, but when I was checking my links collection a little while ago, I found that the the original forum thread had died... (http://www.konradus.com/szufladki/caterpillar/index.php)
I managed to contact the designer, Piotr Koper (aka Klaymen), though, and he was very kind in giving me permission to host the model on my own webspace so that I can share it here with you guys!
The picture I used is from a more than amazing build thread done by morph on the French "Forum en Papier". If you want to try this great model yourself, you might want to check out the tons of great pictures there to see how to assemble all the parts:
- download Piotr Koper's Caterpillar P-5000 powerloader
- see morph's build thread at Le Forum en Papier
Have fun building!