Don't wait!
Here it is!
The Big Finale!
(One codicil: may be NSFW due to racial stereotypes common to the era [1950].)
Apparently very few people sent postcards because the Dover Boys have never been reprinted and never reappeared anywhere else.
And I do mean NEVER!
In 2011, Archie and Friends #137-138 and #150 featured a storyline involving almost all the "forgotten" characters from MLJ/Archie's long history from Suzie to Sam Hill to Super Duck crossing dimensions to Riverdale to encounter Archie and the gang...except the Dover Boys!
Sad, ain't it?