How can I buy the parts for this product?

Printers are programmed to reject non-genuine ink tanks and toner cartridges.
Some of them are also designed/programmed to stop working altogether if you fit an aftermarket product and you will have to get a new printer. Most likely you have one of those.

Never use non genuine products. You can try and pull the new genuine OEM toner cartridge out and refit it and see if the machine will reset and recognise it. If not I don't think you are going to get it printing again and you will be up for a new printer..

Follow some of the trouble shooting procedures in the user manual and if none of these work you are probably done with that printer.

I would contact the manufacturer.

It depends on gender and size, but I found a wide variety on eBay.

Your either going to have buy a new one which I'm sure you want to be a plan Z. With that said, your going to have to weld it at a position that is not adjustable or is possible weld and screw 2 sides where it can move at the broken angle

You need to give us a better picture and description of your problem. It looks like you are working with a basketball goal that is laying down on the ground. Do you really mean only the "Net," or are you using the word net to mean the whole backboard mechanism? Are you talking about hooking the strings of the net to the orange "hoop?"
Is this the first time you have tried to raise it, or has something changed after you have used it successfully for awhile? Is this new and you put it together yourself? If so, you probably made a mistake. Review the instructions, or ask a mechanical friend to look at it.
Often the answer is easy - its asking the right question that is the hard part! Hopefully you can understand that you have not yet asked us the right question.

Here is a link to the manual you are looking for. I found it on the manufacturer's official site.

I believe this is the product you are referring to. The link is to the item on Sears' website. You should be able to find a manual there.