im getting close to installing new membrane on this project and thinking ahead here. the AC unit is an emerson eqk135 and the shroud was a wee bit dried up( i think 29 years of weather had something to do with that) and didnt take too kindly to being removed. soooo, now im lookin at new shouds but dont seems to be able to find one model specific. are the shrouds model specific or are there measurements i have to fit or ????