For dirt bike stuff (accessories only) the only decent place is Bob's Cycle Supply in St. Paul. Bob's is O.K. but even there you will find more MX oriented stock and I wouldn't go expecting to find anything "exciting."
Otherwise just dealers with what I would call a meager stock of "enduro" stuff, including bikes this time of year. (read snowmobile season) No GasGas dealer here. Other dealers are typical large bike dealers with a little corner for dirt bikes.
Larson's Cycle in Cambridge, MN (KTM and Japanese and I haven't been there in years) is the closest thing to what I would call a "good enduro shop" but again I wouldn't expect anything "exciting." It's about an hour north of Mpls. They ARE the new Husaberg dealer in this area. That's about the only reason I'd make that drive but who knows if they have any bikes on hand...