I am aware of Tractor Supply Company as one of the leaders in this field. I would start with them as a first source of information. Hopefully they can meet your needs.
One can purchase tractor seats online from the website Northern Tool. One can also purchase tractor seats online from other websites, like Deere, Tractor Supply and Farm Machinery Show.
You can rent a tractor from a tractor farm supply store. They should have some to select from for your project. It is like renting a car but in use for hard labor.
Someone looking for information about tractor parts can find them online or at some stores. Stores like Farm and Tracker would be knowledgeable about tractor parts. Also, checking online for tractor parts one needs would be helpful.
How you should fix a tractor fork depends on the type you are using. You should look at your instruction manual or call your local farm supply store for instructions. You can also search online for your tractor fork to find instructions for how to fix it for various issues.
A local's farm store or a main stream chain farm store such as tractor supply company or farm and country would have exactly what you are looking for.
There are several online stores that sell used tractors. Local tractor supply stores should also have some good used tractors.
You can purchase farm tractor pants at a local store that specialisation that is into making these types of speciality pants. Checkout many different stores for more information.
Your local farm supply store/warehouse should supply tractors, as should many specialized hardware stores. If you can buy a lawnmower there, a tractor is probably also within their reach.
Tractor Tires can be purchased at several online retailers. Examples include TireTown Farm Tires (www.tiretown.com) and Tires Unlimited (tiresunlimited.com)
If you are looking to buy a used farm tractor online, there are several websites that offer classifieds for secondhand farming equipment such as Farmers Weekly and Agriaffaires that may be helpful. Ebay may also be another option, but in order to get a good idea of the price range for a tractor it is advisable to visit sites that specialize in farm equipment.
Tractor Supply stores carry a wide variety of gifts from toy tractors for kids to farm and animal playsets. For adults, you can find power tools and apparel.
One could go to the diesel page that is found online or go to a local truck or tractor supply store such as a Quality Farm and Fleet and inquire about duramax diesel.