well thats no good

check this out...

http://www.banjobrothers.com/products/seat-bags/waterproof-saddle-trunk/

I have a couple of their smaller seat bags which are well put together.  This one has a waterproof liner which I believe is removable.  Depending on the size of your lunch, rain gear and odds and ends might work.  Banjobros is a Minnesota company so their stuff is all over the Twin Cities where I live but I don't know how well distributed it is throughout the rest of the country.  Very reasonable prices and they are very generous supporters of our local bike clubs.

All that being said-I love my revelate viscacha and you can always cinch/roll it down to carry a smaller load;)

alas I am looking for a KM or Xcheck in the same sizes myself:)  but thought about "settling" on a pacer for a commuter but doesn't really give me the tire clearance i was hoping for nor is it compatible with the components i have laying around.  sweet bike-just a different breed.

i wish you lived closer to me (Minnesota)-i would jump on this then figure out what to do with it.  with the cost of shipping though it might not make sense.  unless i had something you were interested in trading for.  anything in particular you would be interested in trading for?