Go to your local Sam's Club if you are a member or you might try Home Depot or Lowe's. Many businesses offer utility carts and since yours is for home use you may be able to find one at a lower price than if needing for commercial uses.
You can find wholesale utility carts with wheels online. Some sites include www.rubbermaidwholesale.com/rubbermaid-carts/, www.nextag.com/utility-cart-wheels/shop-html and www.amazon.com/b?ie=UTF8&node=490895011.
The folding utility carts were first created by a company known as folding Inc. You can go to the website FoldingInc.com in order to find out more about these.
All utility carts are resistant to the type of damage you mention. ULINE sells stainless steel carts, but I would go with sturdy plastic carts for the best protection.
Depending on the purpose and size required you can find information on getting a utility cart for a variety of places. Smaller utility carts can be easily purchased from retailers such as Amazon or Ikea. However, if you need a larger utility cart you are able to rent them from places such as HSS Hire.
A rolling utility cart can anywhere from $21 to hundreds of dollars. Heavy duty carts cost more but you can always find used carts for sale.
There are several types of utility carts that can be purchased. I suggest browsing the selection at www.homedepot.com.
You should find the cart you like. Then call the manufacturer about ordering them dirrect. There are several online wholesalers for rolling utility carts. I would use a search engine to find contact information for the nearest utility cart wholesaler in your area.
A utility cart can be found at a local hardware business or even a supermarket. The best way to find various offerings of utility carts would be to research it online through multiple companies.
I do not find any companies offering those parts exclusively. It would be best to call the company who makes the carts and ask if they sell parts.
There are many different companies the sell rolling utility carts. Quality carts are more expensive and the best cart varies depending on price range.
Carts are used to transport material. These can vary in size.
National Business Furniture sells rolling utility carts and ships them via FedEx or UPS. They arrive within one to two weeks. NexTag and Sears also sell rolling utility carts that could be used in a business setting.