Ive had good luck with the Arnott brand bags, (both in BMW and in Mercedes applications) they seem to be every bit as durable as the oem stuff. if I recall correctly, they will also buy your old blown struts too ! (might help offset the cost if the shipping is too cost prohibitive)
good luck! I hear the roads out there can really dole out a beating on cars!

__________________
2003 X5 3.0i (02/2003) sport package, Sapphire black metallic / Black Dakota Sport seats. compass mirror retrofit, trailer hitch retrofit, Prodigy P2 trailer brake controller installed, PDC retrofit, Lumbar support retrofit. heated rear seats retrofitted. Running boards retrofitted and subwoofer install in progress. 4.8is Brakes installed front and back. Bluetooth TCU installed, Rear Fog lights installed. Retrofitted reclining rear seat backs.