Terry is correct. You should be able to get it online at the website she mentioned. But I am a little curious! I see your selling your home. Do you have an attorney working with you? Your attorney should be able to get a copy for you or from the title company. Some additional information from you would be helpful so that we can give you a complete answer if there are any other problems let us know. We can help.
Licensed R.E. Agent
NYS Certified Residential Appraiser
The original stays in the registrar's office, and you don't need it to sell or otherwise transfer title - you would have a new deed drawn up for that.
But if you want a copy, Anna & Terry have told you how to do that.
Hope this helps,