Laptop Casing Available In the market?

@neillaboriante that will entirely depend on the exact model of your Toshiba. Most like is that it is not available from Toshiba directly and it is most likely not offered as a new part. You may need to depend on finding it at places like eBay AliExpress etc.

Post some good pictures of what your damage looks like with your question. That way we can see what you see and hopefully can help you out further. Going by your description it sounds like you will at least need the bottom case and the hinges....Adding images to an existing question

Historically, Toshiba never supported self-repair or made replacement parts available to consumers. In fact, they did the exact opposite by actively fighting independent repair technicians with lawsuits. They are the poster child for the Profit-before-Plant/People machinery.