a hardwear store i think
You can buy a Presser Foot Screw at "IronAway" store
www.toolsforwoodworking.com
There are tons of places that you can buy the screw extractor from. Retail stores like Sears and Ace Hardware definitely has them. Amazon.com also have them available online.
You can't. It has to be a steel tip to withstand the torque.
it depends on what board or brand you buy most of them don't come with a screw driver and they also come with screws decks and wheels that's if you buy them at walmart.(the cheapest board to buy>() Or usaully you can buy them separate at a skate shop.
Buy wheels, trucks, and a deck and screw them together
Buy one!
It doesn't look like used ball screw jacks are plentiful at the moment. Here are some suppliers that sell new ones: http://www.thomasnet.com/products/jacks-ball-screw-41400409-1.html If you looking to buy a used ball screw jack, then I suggest you vist www.directindustry.com. This should help you solve your answer.
There are many websites where you can purchase ball screw nuts. A few of these sites include www.homedepot.com, www.lowes.com, and even www.amazon.com.
You can buy the Mini cooper 2003 dashboard screw online at http://www.ebay.co.uk/bhp/mini-cooper-dash.
You buy a new one and use a screw driver to take off all the wheels and stuff and switch the boards and screw them back on. :/
You can buy a ball screw at many different hardware stores. Home Depot (www.homedepot.com), Lowe's (www.lowes.com), and Ace Hardware are three such businesses.