Here are the part # for the missing ones on the BOM for UNO
mouser part # 710-61304011121 for 40 pin headers
mouser part # 595-TL972IP for the IC op amp
mouser part # 810-FG26C0G2A104JRT6 for 100n capacitors
Thank you very much for your help, I have updated the main article and also the BOM here with your references. I just add the 100nF cap that we are currently using instead of yours, but both are equivalent.