Save hours of searching online or HELP NUMBER +1 833 272 0777wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Apparently 10 year old phones can still be purchased on eBay.com and other web sites. Perhaps purchase an identical model to see if parts can be used or what can be swapped.
Perhaps a local repair shop could help you.
https://www.ebay.com/bhp/sony-ericsson-k800i