It really depends on what BRAND the laptop it is.
If it is a relatively new laptop (less than 2 yrs) then it may be harder to
locate replacement parts.
If it is older than 2 yrs, your best bet is to do a search on eBay for a used panel.
Is the PANEL itself visibly cracked?
If not, it may just be the backlight that is damaged (and replaceable).