1. This cassette was sold with the 7 speed LX Hyper-C parts groups. Is this part group still manufactured and sold?
probably not.
not familiar with that hub specifically..
Id just look for a replacement wheel & not fuss over discontinued stuff ,
another 7 speed width wheel.
prior postings say there are screw on freewheels with an 11 top cog,
a freewheel hub wheel would be cheap,