The circuit board was put on by Alesis as the signal was too hot with the piezo being so close to the Mylar head..you are not going to find them with a board unless you contact Alesis directly... most users removed the board after doing a mesh conversion as the piezo sits deeper in the shell.
The jacks are available at a number of places..determine if you need 3 pin (single zone) or 4 pin (dual zone)
Check the body dimensions...there were some red ones that are for Roland and others
Then google or search Amazon or ebay Amazon for uxcell Audio 6.35mm 1/4 Inch Jack Panel Mount PCB Connectors.
There are other companies but the uxcell were for the most part a match.
The kick tower that was destroyed was a waste...those were the type where you could simply replace with another Tom..including 8"..10"..and 12" in a matter of a few minutes.
The newer towers you can't , you're stuck with 8"
JACK REPAIR