ISO Disposable Chafing Dish Racks

We're having a party and I was wondering where I can buy chafing racks (the kind where you place the aluminum foil pans on top and heat with those little bottles of gas) locally? The restaurant is supplying the aluminum trays for the food so I won't need trays - I just need the racks.

I could buy it from Amazon but they don't ship as quickly as they used to (no I'm not a prime member) so I want to find some place that sells it cheap locally.

Thanks!