I made this for a job I was working at a few months ago. We had older style Panduit wall plates and needed a few one port plates and didn't have any, and couldn't get them because they were out of production.
I used a two port wall plate to get the dimensions for the plate and designed a single port version of it.
This plate is hard to print, you'll have to orient it on its side and use lots of supports to both the inside of the plate and to the bed to avoid a bad print due to the large spans and overhangs. I don't recommend printing from standing on one of the ends, as the part may fall over.
ABS or PETG is recommended for a more robust part.
3ds max 7.0 and calipers were used to create this part.