Try : http://www/.ricksteves.com
Expandable Wheeled Bag * $119.00

Best of Both Worlds: 1000 denier Cordura nylon keeps the front rucksack-soft, but the rest is lined with a hard lexan shell to give maximum protection to your belongings.
Carry-On-Friendly: Measuring 9" x 21" x 14" (un-expanded), it fits within airlines' carry-on guidelines -- and weighs in at a mere 7.1 lbs.
NEW! It's Expandable: When you need to carry more, pull on the expando-zipper and gain an extra 2" of cargo depth (making your bag "fatter" than the carry-on limit).
Big and Practical: A generous, fully-lined 2500 cubic-inch main compartment inside, plus three outside pockets (small, medium and huge)—perfect for often-used items.
Extra-Long Handle: The telescoping handle extends a full 23" beyond the top of the bag, giving you more rolling comfort.
Zoom Zoom: Big, strong inline skate wheels glide your goodies over uneven surfaces.
Piggy Back: The outside add-a-bag strap lets you clip on your day bag, and roll 'em together.
Handy Extras: We include a pair of mesh bags for smaller items, and a clip-in security pouch (which you can also clip inside your Appenzell Day Bag).
Compression: Two internal compression straps keep your load compact and stable.