Any recommendations for quality providers in the Philly area who are open to last minute bookings?

Best bet would be the agencies. There are K orgs and other agencies in Philly and the suburbs that can generally handle last minute. You just need to get screened in advance.

I accomodate last-minute outcalls

I accommodate last-minute outcall bookings!
Just shoot me a text with as many logistical details as possible so we can get the ball rolling.