I need a pair of engine vents for my 28 sport fish, When I got my boat the orig. ones were missing and somebody put the wrong ones in place. The hole dimensions are aprox 24"-30" long and about 6" HIGH. I can accomodate a larger vent if nec, but would rather not have to re-engineer the air box. I know alot of you are changing over to the "slane" vents and hope there are some leftover OEM vents available. thanx, Overspray