Frame bag for a Trek Sawyer?

[Steve Gilbert]

Anyone have experience finding the ideal frame bag for the Trek Sawyer?  Size Medium?  Here's a link to what the bike looks like...and you'll quickly see the issue the frame design creates for a frame bag.

http://www.trekbikes.com/us/en/collections/gary_fisher/mountain/cross_country/sawyer/sawyer/#

Thanks.
Steve

[fotooutdoors]

I would go custom.  If you look at the Bikepacking subforum on mtbr, there is a list of bag makers.  It shouldn't cost much more than an off-the-shelf bag, and you will get a lot more capacity; the small front triangle (upper one) just begs to have a second bag for snacks or other often-accessed items.