I have 2009 Honda Accord Euro which as far as I know is the same car as a Acura TSX. Yesterday one of my ignition coils failed and I got OEX OC631 from repco (they only had one). I want to replace the remaining 3 but no I see OC631 is out of stock but there is a an OC631C. I dont see any info about what the C means. OEX company website doesnt seem to the list ignition coils. Any advice what I should do?

Thanks for any help.