You will likely have to search the used market or find other means of finding a board for a processor this old.
Intel no longer makes desktop boards. Try searching ASUS, MSI, etc for older boards.
Here is a list of intel Compatible Motherboards
EDIT: Using newegg to search for LGA1156 motherboards, I found these:
The above link is provided merely for your convenience.
This does not mean your processor will work with these boards. You MUST confirm that the boards BIOS supports your processor. Only the board manufacturer can tell you that.
Also, with a processor as old as yours, I question the usefulness of keeping it, rather than getting a processor (and motherboard) that is current. Of course, this also means replacing memory, processor fan, and other components inside the case.