Leather band conversion

[FLcarguy]

Hi Everyone,
I am new to the site but have owned a DateJust for 20+ years. I rarely wear it now because I added a diamond Bezel that I think is too flashy. I recently saw a Rolex bill board (in south Florida) that showed a typical oyster looking case with a leather band. The key was that there was a "hood" between the lugs that gave it a finished look. I have a Tudor Tiger that came with both a leather strap and a metal band. It came with a part I add between the lugs when I change to the leather band that gives it that finshed look. Now to my question. Is there a source for a similar "hood" for a 1980s vintage two tone Date Just? Yes, I have the origanil bezel and will go back to it if I can get motivated with a different look. If this part is not available from Rolex I would consider a non-origianal part. That is because I would always be able to return the watch to its orginal look.
Thanks fo r reading and any insight you can provide me.