Both scenario's 'Hollow Victory II' and 'Operation Market-Garden' can be found in the games depot of the Wargamer under 'Westfront with Sea Lion Expansion'. If you nevertheless can't find them, please give me your e-mail adress and I'll send them to you directly.
Hollow Victory II is an improved Hollow Victory (corrected map, improved OOB). Operation Market-Garden Is both an improvement (map, OOB's) as well as an extension of Hell's Highway. The map is significantly wider, since with Hell's Highway I experienced a lack of 'room to maneuver' especially in the area west of the town of BEST (US 101 AB Division and German 15th Army area). As a consequence, more troops (both Axis and Allied) are involved.
By the way, notice that in both scenario's some bridges over major river hexes (full hex rivers) are intentionally not able to be blown! That is to say, ´Jasons Trick´ is NOT applied there. For example, the Highway bridge over the river Rhine at Arnhem. With the entrance of Moeller´s SS engineers (9 SS Panzer Division) rather early in the game, and Arnhem not yet occupied by the Red Devils, the scenario would come to its end too soon. Other bridges, however, (e.g. Railway at Oosterbeek, Railway bridge over the River Maas near Mook and many others) can be blown!