Thank you for the offer I have no idea what that would cost. And how I could pay you??? 
 
My intention is to test the midification of old organ for church using Sonic Cell for the sound. 
I wanted to get midi merge with 13 note pedals for start using keyboard(channel 1) in to midi merge with pedals added to midi on channel 3. 
I was going to use midi128 16F877 hex file if it is possible with 1 din module. 
 
I am able to get 18F chips for about $8 if the concept is acceptable to organists, only demo at present I have 16F887 chips at hand. 
 
Regards 
Allan