I was in the market for a pre filter and bought one a year ago. Funny thing is it is still sitting in a box on my shelf. I was overseas when I ordered it on line and did not realize I needed a 3.5 in wide opening. I have been searching online for one but have not found any promising ones. I found some on ebay but I don’t want to by a junk pre filter. Do you know if this will come in a 3.5?