A hypercharger is an air intake cover on a motorcycle, which ducts air through a butterfly opening and over an air filter into the intake of the engine. The most popular one is made by Kuryakyn.
Yes, any of the hyperchargers for metric cruisers will fit but you need a special adapter (NOT in the kuryakyn kit) to make it work. The adapter is about $179 from http://www.thundermfg.com.
There is but its cosmetic only sorryhttp://www.cruisercustomizing.com/detail.cfm?model_ID=5&Category_ID=0&manufacturer_ID=16&product_ID=4087&sblid_name=Kuryakyn_Hypercharger_Housing_Kit________Shadows__for__
Assuming you mean "Carburetor Hypercharger", it's a poor mans bolt on supercharger. It accomplishes the exact same thing as a stock air cleaner but it has slightly better air flow.
Here is a link to one I found. You may also have luck looking for C50 model hyperchargers. http://www.westendmotorsports.com/kuryakynthunder-brhypercharger-adaptor-volusia-included-p-1905.html