The service manual is
here, and the support page with exploded view and parts list is
here.
The original Amana / Whirlpool part number was
53001594 but it is no longer available. Another matching part was
WP8206570 but those are "NLA," too.
The service manual will not show the LG part number.
If the attached photo from the Pros is correct, then the original LG number was
2M246-310GF.
You may be able to find one in "new old stock" by any of those numbers at local or online parts suppliers or on eBay.
Contact me directly if you need more help.
- William E. Miller, AS-EET
[email protected]
http://www.MicrowaveControl.com
Microwave Oven Control Panel Repair Nationwide
"Recycling by repairing since 1982"