Hello Arabella 1111,
Interesting laptop you have there, one of the few that allow you to swap out or upgrade the graphics card, you can find replacements on Ebay if you click here. The laptop is 10 years old and depending on who you have swap the video card you may very well spend a couple of hundred dollars having someone install it. Another option would be picking up a used laptop of the same model off of eBay or Amazon, they sell for anywhere between $200.00 – $250.00. Which may very well be more cost-effective than having someone swap out the graphics card.
I recommend getting the used laptop of the same model and swapping your Hard Disk Drive or SSD into it, here is a quick video on swapping out the HDD / SSD.