I received a response from Teenage Engineering stating that this part is not available as a replacement part. This is unfortunate because this is usually the part that gets banged up when used.
Ok... finally got the connector board out. It took a bit of gentle prying using a very small thin screw driver bit on each side of the connector board. Once I had the right side popped up a bit I was able to push on the input output jacks from the outside to get clearance. Removing the connector board and putting it back in resolved the power switch issues I was experiencing. No new connector board needed! :)