There are a handful of resellers that handle these types of transactions. I would suggest starting your investigations with http://re-manufactured-engines-online.com/. Please note that some places charge extra for shipping, which can be very expensive.
JASPER engines rebuilds and sells engines. They're a very reliable company for anyone looking to buy a reused engine. It is very affordable and you can expect what you buy to be of good quality.
Rebuilt engines are repaired as needed to perform to the rebuilder's standards. Remanufactured engines are completely rebuilt to OEM standards.
absolutely they are better. if they are rebuilt right that is.
A number of online auto parts stores offer rebuilt or re-manufactured transmissions. Some places to try include Certified Transmission, Jasper Engines, Tom's River Transmissions, and Transmission Rebuild Center.
Try JDM's website. They will give you a list of available retailers that are authorized to sell their products in store and online. Then you will have options on where you choose to buy.
Their are very few physical advantages of having a rebuilt engine. The only actual advantage of having a rebuilt engine is that it is much cheaper than a new engine.
Yes, you can easily find such block parts for your vehicle from a number of sources available online, where you just need to visit once and a vast range of automobile engines (remanufactured/used) will be listed on your screen. One such source that is coming to my mind now is hiperformer.com, which deals in remanufactured, rebuilt and used engines. You can also Google some used auto parts stores online to have some options in your hand.
Jasper
New engine? Dealer. Used engine? Salvage yard. There are also some places that sell rebuilt engines. A Google search is in order.
Many search-booking engines on the internet to compare and book online.
You can look around in the local paper and classifieds magazines as well as places online but it would most likely be best to ask around to your local mechanics.
You can usually buy rebuilt parts from a salvage yard or a repair shop associated with a salvage yard. You can also buy these through the internet.