ZWO
Remote control cable for Nikon DSLR (MC-DC2, 8PIN)
$ 19.90
ready for shipping in 3-5
weeks
Skywatcher
Electronic cable shutter release for Nikon D3 (AP-R1N (N1))
$ 20.90
ready for shipping in 1-2
weeks
iOptron
Nikon MC-DC1 Shutter
$ 68.00
ready for shipping in 3-5
weeks