Proxy Support For My Scripts

Hello,

I have been utilizing private proxies & public proxies to use my php scripts with for domain look up details.

However, I am unable to purchase proxies anymore from my previous supplier. So I am looking to pay someone for either:

1.) Private Proxies on USA IP's. I need 50 - 100 proxies.
Or
2.) Find a way of scanning for proxies, so I can have an updated list of public proxies that are working. I can supply the IP ranges of USA IP's to use the proxies from.

I would prefer option #2 but public proxies are very slow. If someone can provide private / dedicated proxies, I am willing to pay your price.

Escrow or upfront payment is not an issue.