Is there a piece for his canal where i can make a larger bridge?
like a left side piece a middle piece and a right piece, i have a canal thats about 8tiles, but all his bridges are about two tiles wide...
Right here:
http://sc4devotion.com/csxlex/lex_filedesc.php?lotGET=1509
That is, if you're looking for the GMAX model to make your own bridges of course. If you're looking for an in-game file, I don't think there is one. I made a set for the retextured canals found here http://sc4devotion.com/csxlex/lex_filedesc.php?lotGET=979 but you'd need to replace all of Goobers canals with the new ones.