Where to buy arena sand in Southeastern PA / Chester County?

I am in Chester County/Southeastern PA and want to purchase sand top footing for my new outdoor arena. It’s a personal use/small commercial arena so I’m trying to balance staying on a budget with obtaining the best footing possible (not easy).

I think I want a sub-angular natural or “silica” sand rather than a crushed rock/manufactured sand. For particle size, it sounds like it should be around a 50 or 60# sieve

My plan is to get the sand this year, then wait a year to financially recover and then put in a fiber based footing additive like a GGT or carpet fiber, but I am trying to pick a sand that will ride okay on it’s own, but play nice with the additive later.

Does anyone in the region know where I can buy this natural sand? Does Penn/MD do it and are there other quarries I can check with? Alternatively, has anyone had good luck with manufactured sand and an additive?

I’m trying not to screw this up!