I have a Jepp sub and a few spare cards. I just update the card for the month for my aircraft and take the previous months out and it usually ends up in another aircraft for VFR use and I take the old card and reuse it in the next cycle.
Jepp charge outrageous amounts for the data and it annoys me paying multiple times for the same stuff, Jeppview, Flitestar and Garmin.
If you are not too pissed with me Peter, email me and I will share a secret with you on programming the cards.