The maximum field stop for a 1 1/4" (32mm) eyepiece is around 27mm- and this dictates the maximum possible FOV - and therefore the maximum AFOV as well.
Televue note that their 32mm Plossl with a 50 degree AFOV and a 27mm field stop gives the maximum true FOV possible for a 1 1/4" (32mm) diameter eyepiece.
A 38mm fl eyepiece with a 52 degree AFOV would need a field stop of around 37mm diameter- which would mean an outside diameter for the eyepiece of around 41mm or 1.6"... This is quite difficult to achieve with a 1 1/4" eyepiece.
Sorry Tropo-Bob, but as you suspected it isn't possible.
(BTW, I loved the blurb for the Neewer eyepiece in question which states that it "Comes with a standard 1.25" interface..." I suspect that the person who put together this ad simply has no idea.)