This is the dsPIC33f chip included with the MicroStick development board by microchip and we have a bunch of them. It'd be nice if they worked with your blockset.

Nevermind, it looks as if this part is supposed by the blockset, though it's at the bottom of the list and out of order. Lubin, can you reorder the list of PICs so that they're in order? This'll make it easier to find the part you want.