Yes
Browning has made centerfire lever action rifles in various calibers over the decades.
AFAIK, only if you do a custom order.
AFAIK, Browning didn't make any rifles in that caliber.
Typically 1970-1974.
No
Contact Browning, try e-gunparts.com, any of a dozen stock makers would probably make you one.
Fully automatic shotgun, no. Automatic rifles and machine guns, yes.
No not that I am aware of.
Sorry- there IS no ONE "best". Ruger, Browning, Winchester, Savage, Remington ALL make very good rifles- but there are also European makers that have great rifles.
Possible, but, not likely.
No, never