I need to purchase the black part that makes it spin on the roof of ccp-510

There are no replacement parts available for Nostalgia Equipment.

There are no replacement parts for Nostalgia electrics products.... anywhere.

The Manual for the Nostalgia Electrics CCP-510 Vintage Collection Old Fashioned Movie Time 53-Inch Popcorn Cart Manual can be obtained form the following link:

http://nostalgiaelectrics.com/manuals/ccp-510.pdf

CCP-509 User Manual
http://nostalgiaelectrics.com/manuals/ccp-509.pdf Instructions for use see Page 7


CCP-510 User Manual
http://nostalgiaelectrics.com/manuals/ccp-510.pdf Full instructions see Page 10


The instructions for the CCP-509 are not specific about the quantity of oil and kernels to use. The instructions for the CCP-510 are clearer, stating that for every measuring cup full of kernels ( 4 oz.) add 2 tablespoons of light vegetable oil.

Here is the manual

http://dl.owneriq.net/b/b53694d9-c177-4574-9997-9d4b1a514774.pdf

Here is a link to Nostalgia Electrics..Fill in their form and you can go from there. Here is the link...
http://nostalgiaelectrics.com/default.asp?a=service copy and paste it into your browser or try to click on it..Hope this helps you..Wayne

Call them at this number and see if they can provide you with a source for the "replacement" motor.

The Helman Group, Ltd. 1621 Beacon Pl. Oxnard, CA 93033-2452. Phone: (805)487-7772. Fax: (805)487-9975. Tollfree: (800)217-1958.

The CCP-510BLK will use the same parts as the red CCP-510. For replacement parts, try calling Nostalgia Electrics at 920-347-9122.

http://www.helmangroup.com/nostalgia/manuals/ccp-509.pdf
here is the manual.
looking for replacement parts myself