My Europa had jack problems it kept crackling and cutting out I changed it for a new one that was kindly sent to me free of charge by a forum member in the USA. Subsequently to that i've found that the same problem exists if I use leads with moulded plastic jacks since the plastic extends marginally further down the shaft of the jack making it slightly shorter than a metal housed jack plug and as a result doesn't fit far enough into the socket to snap into the clip inside.
You should have no problems getting one from Alembic or even finding the right model number from her to get it locally.