Thanks for contacting us about the windscreen. Sure we can help you with the new windscreens. With a 300' coverage area, it's much easier to split those into smaller panels. I would recommend going with (6) 50'L panels. This will make installing them much easier. As well as allow you to replace sections as they wear out instead of having to replace larger areas of windscreen which would be more expensive.
Did you have any idea of the material you wanted to use? If not, here is a link where you can view all the different materials available:http://www.practicesports.com/cgi-bin/category/custom-windscreens
If you need help with a recommendation we can give you a call to discuss in detail. Regarding payment, we accept checks, PayPal, credit cards or electronic checks. Since you're with a booster club and not directly associated with the school unfortunately we can't accept PO's. Please let me know if you have any other questions.