I need a curl expert to scrap a data from other website

I need a expert for curl and download all data from other website, we already made the full website and details only the data is missing , right now we using iframe to get data directly from the site whenever user need. but we want all data in our server. Also we tried to use cron , but getting blocked. I used random ip script whatever it getting blocked every time. Just i need a cron script which need to download all files continuously to our server without getting blocked.