I was wondering whether any of you know of a bag that's like the Western Flyer but not?

What I'm looking for is a small-ish soft-sided bag to go on top of a carry-on wheelie. It would be nice if this had a slot for the wheelie handles AND backpack straps. Is there anything in the same class as the western flyer that has these features? I noticed the B&R Convertable Travel Tote (224 Baseline) - it has the straps and the slot for the wheelie, but it seems too BIG! Is there anything smaller? I don't really need a maximum carry-on size.

I like the Western Flyer, but would like to compare it to some other options (that are possibly less pricey).

Thanks!