I did not get a Trek 520 for a similar reason, a few years back. <rant on>Why, oh why, don't bike shops stock touring bikes?? <rant off>
I don't honestly know what's closest to a T1/2 in Cannondale's lineup. I'd suggest, though, that you might want to negotiate a bit with the shop. I sort of wish I had taken my LBS's best offer, which was that they'd order it with the understanding I would buy it unless they couldn't get it to fit. If you can get that sort of deal, then the onus is on them to make it fit. Really, there's only a few things they can do to correct a fit. (1) Raise or lower the seat. (2) Slide the seat forward or back. (3) Change saddle tilt. (4) Change out the stem. Make dead certain you have a deal with the shop to swap the stem, if that's needed, before you order the bike.
Note that the feel of the bike is going to change when you load it up, so to some degree, you have to pick something you think will be good and adapt to it.
Also, some REIs have carried Cannondale tourers on and off. If there's a few in your neck of the woods, you might want to call around and test ride them if they have them.