"Sorry, sir, my pump got caught under the brake pedal!"

[Joe CalPo]

As for the bus, it'd have to start with finding the full size model they used, find a model, and build an entirely new interior.  Probably not, but maybe someday.
 

1954 Ford B-series bus, according to:

https://www.imcdb.org/vehicle_842868-Ford-B-Series-1954.html

So it fell through a time hole backwards before the Korean war started so it could be used...

[Rick Lowe]

As for the bus, it'd have to start with finding the full size model they used, find a model, and build an entirely new interior.  Probably not, but maybe someday.
 

1954 Ford B-series bus, according to:

https://www.imcdb.org/vehicle_842868-Ford-B-Series-1954.html

So it fell through a time hole backwards before the Korean war started so it could be used...

Whatever you decide is appropriate for the backstory...     
Maybe a prototype sent to be tested to destruction?

Phill - didn't know that was the particular issue with the boom... what were they thinking?

[Wardukw]

As for the bus, it'd have to start with finding the full size model they used, find a model, and build an entirely new interior.  Probably not, but maybe someday.
 

1954 Ford B-series bus, according to:

https://www.imcdb.org/vehicle_842868-Ford-B-Series-1954.html

So it fell through a time hole backwards before the Korean war started so it could be used...

Whatever you decide is appropriate for the backstory...     
Maybe a prototype sent to be tested to destruction?

Phill - didn't know that was the particular issue with the boom... what were they thinking?

Mate i am certain they knew how bad it is ,,saving money is all it will be ,,well that and laziness too ,,,that boom ruins the model ,,definitely