Hi,
You could try finding the board number that is printed on the pcb containing the faulty chip, then searching online using the number only to see if there are any about.
Alternatively this may be an [https://www.amazon.com/gp/offer-listing/B00538NGEG/ref=dp_olp_all_mbc?ie=UTF8&condition=all|option] to consider if there are no boards to be found. (Especially the lowest priced one)