I don't know of any HP-41 repair services running anymore; but see the
HP-41 section of the links page on my website, starting with approximately the 13th link there, for information on repairing 41's. It sounds like you're talking about the flex circuit which the batteries are pressed up against by the springs in the battery holder. This flex circuit is available brand new from Diego Diaz. (See
https://www.clonix41.org/Maintenance/IO ... _Block.htm but it's also in my links page.)