This is in no way a common conversion so a conversion kit is not available. If you wanted to have something like that done, I am sure that you could find a gunsmith who would do it for a substantial fee. You should expect to put up a large amount of cash up front before he would take on the job.
http://www.guncustomizing.com/tech.htm#chokes There is no "conversion". The choke constriction is the choke constricition. What its called varies.
Theoretically possible.
Poke a hole in the botom of the can, place your mouth againsts the hole, and pop the tab. This is also known as a "Turkish Tap"
Anything is possible.
It is possible, but, only law enforcement can do it as a rule.
The Turkish Khan Centurion Shotgun is not designed to eject fired shells, but only extract them. The Turks are a thrifty people and many reload their own shotsells. I have lived among the Turks and gone hunting with them, in particular Wild Boar hunting. The Turkish country people hunt the Wild Boar with their own reloads of buckshot, because the Turkish Government frowns on the sale of buckshot shells or rifle cartridges. The people melt down bird shot and cast buckshot, which they reload. They would not think of eating a pig, ( domuz in Turkish ) but hunt them because of crop damage. A shotgun which ejects and throws the fired hulls all over the place is considered undesirable by the Turks. --- Joe Boyd ---
Entirely possible.
It is only a mod. it is not possible, sorry.
No.
Anything is possible if you have enough money.
Possible, but, not recommended.
Proofhouse.com has a store brand conversion chart that might help.