Where can I buy Northern Pike or Muskie/Tiger Muskie for a tank?
Web sites or anything?
If you live in the US chances are no where. Although fish laws vary from state to state fish that are raised as fingerlings by the state to supply stocking are not allowed to be sold in the state. I live in PA and it is against the law to sell, breed, transport out of state any native fish or turtle dead or alive.
Your best bet as the other poster said is to go and catch one. There are some supplying farms however in Georgia and a few other states that you can actually buy these fish for stocking your pond, but we are talking about poundage of fish here not just one or two.
You may want to call your local fish comission. If there are any of these breeders/suppliers they should be able to tell you where you could purchase a small amount.
ESOX v1 Musky Pike swimbait prototype