There are instructions on the interweb to make your own 4-way fish trap. Very similar to the ones sold here:
http://www.castnetworld.com/baitfishtraps.html


www.hoosierpondpros.com


http://www.pondboss.com/subscribe.asp?c=4
3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).