I just stopped by a local EMS and found this great pack cover that is waterproof that is going to work perfect for a seat cover I can keep in my glove box and use at times when I can't find a parking space inside. The small fits my LX50 seat perfectly, and I figure I can use it on my backpack after I take it off the seat, if it's really raining hard.
http://www.seatosummit.com/products/display/4
Cheers,
JI
