I don't remember seeing any big pads in the SoHo EMS... it's NYC, stock space is limited. There is Tent & Trails downtown but I don't know if they have any pads, and Paragon which may have one or two pads in stock, but I don't think you'd find what you're looking for there.
The right side of rat rock may be 2 meters, but the left side is over 3m. Wood chips? There's not much directly under the rock, it's nicely spread all around the area beyond the fall zone. You don't need a pad, but it wouldn't hurt to have. Just sucks trying to get around the subway with a pad.
Getting there is easy enough. Take the AC, BD, or 1 train to 59th St. Columbus Circle, or the NRQW to 57th street. Walk to the 59th & 7th ave entrance of the park. Head "north" into the park, cross Park Drive, and in about a minute you'll hit Heckscher Playground. Walk around to the left and you'll see the "front" of Rat Rock with people sunning themselves. The bouldering is on the "back".
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