Looking to get a new screen front and back door. Are Lowe's and Home Depot decent or should I be looking elsewhere? Ideally would have one that has both glass and screen options (interchangeable). House was built in the 20's so not sure if that would impact anything. I don't know that they would be a non-standard size or anything....how would I go about finding that out, i.e. what should I measure? Any help would be greatly appreciated.