Hello:

I found this by searching Google, if you haven't already located it. The phone number works. Good luck!:

Frederick Douglass Memorial Park, Size: 14 acres, Status: Active, Location: Northwest corner of Amboy Road and Montreal Avenue, Earliest known burial: 1935, Contact: 3201 Amboy Road, Staten Island NY 10306-2703, (718) 351-0764 [Note: State Regulated]