does anyone make one similar to the 1098/848 tail bag? 
thanks.

I recently saw this little semi-rigid bag at the local Suzuki dealer that I thought would work well on the back of the Monster seat.  It has a firm, but flexible, curved bottom that fits the contour of the seat.  Has a Suzi logo on it, but it looked like it would come off easily enough.  Price was around $80.

http://www.partforyamaha.com/pages/catalogs/detail/35/344/747/15581/1/0/0/0/0/0/0/0/sport-tail-pack.aspx

Lots of tail bags will strap on nicely. Why do you want one like the SBK bag, what's special about it? Does it have features other bags don't have?

muskrat,

Ive been using a Cortech sportbike tail bag all last season on my 620 w/ a cowl and it works really well.

You do have to do a little "wiggle n slide" to get the front straps to the grab rails with the cowl on.
I also shortened the rear straps but other then that it worls perfect.

It has a nice capacity, lots of pockets and a nice soft pad under it to protect the seat cowl.
I've been able to do a weekend solo trip with just that bag.
Fully loaded I notice it does slide forward just a bit under heavy braking, but I'd expect thast with any tailbag.

I give it 

jimi

why dont you just take off your seat cowl?

practical solution....