make a crawler for me

I have a opencart toys webshop (in dutch) based on dropshipping and the csv feeds i get from my supplier are just terrible. The most irritating thing is that the feed is totally out of date. I got a lot of products in my store that arent available anymore and i have to dissapoint customers. The supplier wont do anything about it. But they have a site of their own with the same products, and this site is always uptodate. What i need is some kind of spiderbot that grabs from this site all productinfo and categories and creates a correct csv that can be imported into my shop. Also this must run on cronjob so i can do this crawling/importing daily/weekly. For the webadress or a sample csv that works on my import script please pm me.