Yes you can. They range in price from $10 to almost $30. Go to the Motorola store closest to you and see what they have. If you don't see what you want, they will order it for you. Better to go through them then to try to buy one off the internet.
Yes you can still buy these cords. Either contact your phone service provider abut how to get it, look online, or contact Motorola for information on how to get one.