Richard
It's funny you bring up this conversation as I just did this very conversion a couple of weeks ago
I like you got sick of the lack luster light out put from the old halogen bulbs my first upgrade was to clean and polish the lenses on the old headlights and install LED bulbs the result was nice clean lenses but the replacement LED bulbs although they made for a little bit better or at least whiter light they would no longer focus properly a d left a lot to be desired on high beam .
So I went on line and researched new light assemblies .
I wanted something with clear lens and settled on the units you described with the built in Day time running lights.
Knowing that the stock LED bulbs wouldn't be much better in the new headlights so I opted to remove the lenses from the new light assembly cut the bulb lock of the back off the reflector and installed a set of BI LED projector units .
While I was at it I installed a pair of LED strips behind the chrome DRL brackets inside the headlight assembly which are also DRL units but will flash orange with the turn signals.
If you aren't up to the work of cutting up a new set of headlights there is a company out there that has done the work for you for a price ( the headlights your looking for were originally from a 1987 to 1991 Ford F150.or Bronco
They were also used in the Provost buses.
The DRL units we are talking about off of Amazon come with the mounting bracket headlight adjusters and turn signals .
You won't use the mounting plate and the turn signals are different than the ones mounted in your Beaver.
You will reuse the headlight assembly the new adjusters and reuse the old turn signals ( to clean up the old turn signals wet sand them with 5000 grit paper till they are good and clean and then spray them with a 2k clear coat and they should look like new).
Here is a link to the premade units with projectors for the Prevost ( they are the same )
https://youtu.be/uOWCLLN-8oA?si=Bg6ZDTABOabiEoaOHere are the units I used
https://www.amazon.com/dp/B0BLV94S34/ref=twister_B0BPBS9YQW?_encoding=UTF8&psc=1These are the projector units I installed
https://www.amazon.com/dp/B09WY6QT7F?psc=1&ref=ppx_yo2ov_dt_b_product_detailsThese are the LED strips I installed inside the reflectors
https://www.amazon.com/dp/B08GL9CDWW?psc=1&ref=ppx_yo2ov_dt_b_product_detailsHope this helps
Eric