Best buy, staples any type of retail place like that.
You can go to either of the folllowing websites to find a webcam that is compatible with your Dell laptop. www.dell.com, wwww.amazon.com, www.ebay.com
From dell
One can find reviews about the Dell XPS M1210 laptop online at a number of different websites. One can find reviews for the Dell XPS M1210 laptop on websites such as CNET, PCMag, and NotebookCheck.
The best place to buy a dell laptop bag is from the Dell website if you specifically want a dell laptop bag. However laptop bags are not specific so you may find something you like better and maybe a better deal that would suit your Dell laptop from another vendor of choice.
One can visit the Dell website to view the Dell 620 laptop and find information as to where it can be purchased in one's country. Alternatively, shopping comparson websites not only provide price comparisons but locations where to buy a Dell 629 laptop.
A dell laptop keyboard can be found at Best Buy for around $10-$60. If still on warranty, I suggest you go back to the shop and get your keyboard repaired.
If you go onto www.amazon.com they have a Dell Laptop for $85!!!
I think Dell new inspiron15SE (N7520) is the latest dell laptop model available in the market. You can also visit dell website to find out more detail about the laptop you like to buy.
The best place to purchase new Dell laptop cases would be directly from Dell. Here you will find various designs of cases, sleeves and bags for laptops.
You can go to the specific website of the brand you're interested in, such as Dell or HP, or you can go to http://www.pcworld.com/article/230850/classroom_conundrum_take_one_tablet_one_laptop_or_both.html where laptop and tablet computers are discussed.
If your warranty is still available for your laptop, you can send it back to Dell for a website. Alternatively, you can buy a new motherboard from Dell's official website.
Dell's international (UK) website offers a variety of laptop and computer accessories that can be purchased online. Comet and PC World also offer retail locations to go along with their websites.