http://www.coyotecap.comCoyote Cap is the only place to get one of these 1887 shotguns. There has been alot of trouble getting these manufactured with the other companies including Norinco. Coyote Cap is an experienced 1887 gunsmith and has teamed up with a company in Japan to produce them.
Coyote Caps web site is down right now for updating but you can call them at (507)685-4500 or 5411
I do beleive his base prie is less than the norinco you linked to also.
Coyote cap is expecting the first shipment early this year.
As far as these lever guns being slow - it is all in your practice and ability as to how slow they are worked. Just like a pump gun - ya have to practice. There is a link someplace to a cowboy shooter demonstrating how fast they can be shot and it is very impressive. I'd say it is as fast as any automatic in the right hands. If I can find the link I'll post it.