Stores like JC Penny, Bed Bath & Beyond, etc. have ready made grommet top panels that would only require you to sew their panels together to get the width you want. (if grommet top suits your taste.) I have seen panels with both square and round grommets styles in various color finishes. They slide back and forth on the drapery rod with ease. I have seen outdoor panels in this style as well, but have only seen those online.
The length of ready made panels is limited, however.
I have rarely found anything readymade that I didn't have to 'operate on' in some way to make them fit my space. In my past, elbow grease and vision has made many a modest purchase of mine look chic in the end, but it can be a physically taxing and time consuming adventure!
There are also flat, shoji screen type panels available that slide on a track that can cover whatever width you need. They are ready made in various lengths and can be shortened by simply cutting the bottom of the panel to fit.
(The panels are a kind of light-filtering mesh.) They are very limited in color.
It SO depends on what appeals to you esthetically.
Keep us posted!
