Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, a new or even a replacement OP-24e circuit board would be very rare.
Would you consider attempting a DIY (do-it-yourself) repair approach?
Should it be of interest, let's try figure out why "...9v volt battery gets very hot in a short period of time..."; please post back with a clear / closeup pictures of the top and bottom of the circuit board.