Edit and update 11/7 ..... Thanks to post by @Psacc0 Picked up a Grisham 36 x 60 sliding screen door for $80 at Lowes and 30 minutes later all done and perfect. Didn't even have to RTFM! Eazy Peazy 
Anyone actually have one installed (or installed one yourself)? What did you use? I have seen a couple sliders online and Lowes but the reviews on them are horrible.
Yes, I know I can search the web & Amazon etc and I have, but I am looking for FIRST HAND experience.
Don't like the occasional bugs & geckos entering that are always sneaking onto the lanai through the siding or under the lanai entrance screen door and want to keep the door opened in the cooler weather rather than the front door or door into the garage. We do have a garage screen but "stuff" still crawls in!