There are currently (12-29-07) several western arms Ithaca 12 ga. shotguns listed on Gunbroker. The price ranges are $895 - $925. My grandfather left me his when he passed. It was made in 1936 and is still to this day the best shooting shotgun I own.
AnswerRussia
Where can I buy a magazine for a western field M149 bolt action
I have a 16 gauge double barrel for sale.
Try Shotgun news or Gunbroker.com Try AuctionArms.com or Guntrader.com
A person is able to buy a 12 gauge shotgun in a gun's store or a store where equipment for hunting is sold. One may also buy a shotgun in an exibition show where the law permit it.
Buy one and find out. As an alternative, go to a bookstore and look it up.
Online
It is difficult to find even 10 gauge shotgun ammo today. I have my doubts if 8 gauge shotgun ammo is even made any more, but corrections welcomed.
I'd suggest contacting (supporting) some of the places that advertise on this FAQ Farm page. If they don't have them, they'll know who does.
Federal law says 18
mossberg makes a pink shot gun, and remmington makes a 20gauge pink shotgun
There is a ammo clip for a J C Higgins shotgun model 58324 16 gauge. You can buy it as a replacement part.