This picture is from the FJ55 PTO shaft. The FJ55 doesn't have the bearing under the rad but behind it. Looks like someone doctored the '55 shaft to fit a '40 series.
Here's a picture of my '55 PTO bearing mount. You can see the resemblance.
The pictures do look similar.
But my 1979 BJ40 has no "bracket" (or even "holes for a bracket to be mounted") under the radiator support (on the rear-face of my front crossmember). Yet it does have holes sitting there (on my LH chassis rail through my battery support) ready for that side bracket.
And I bought my winch second-hand (in 1981) and was told it was off an old (1970s) FJ40 (but I admit I could have been misinformed in this). However it did fit my BJ40 without any need to alter the driveshaft length.
Anyway - Back in the early 80s I made my own bracket to support my driveshaft bearing, which worked fine but looked rather "mickey-mouse". (As I recall, it used one threaded hole on the LH chassis rail along with the bolt that secures that radiator frame to its LH support-mount.)
It was only after seeing this picture (that I've posted here) that I realised how I could make a "factory-looking bracket" to do the job. So that particular bracket looks "purpose-built" for my 1979 BJ40 and for my winch.