What size are you looking for? If they're legal in Wi., then you possibly could have someone ship them to you. If you need bigger ones, build a cage, put them in the cage and feed 'em until they are large enough.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).