The BQs were meant to seat five people in the cab, if I recall correctly. A modern safety cab locomotive, be it GE or EMD, generally provides seating for three people, and you might be able to fit a fourth person if he brings his own chair, but five would be a pretty tight squeeze.
MEC407 Moderator: Pan Am Railways — Boston & Maine/Maine Central — Delaware & Hudson Central Maine & Quebec/Montreal, Maine & Atlantic/Bangor & Aroostook Providence & Worcester — New England — GE Locomotives
I'm not sure how accurate the Lionel U18B is - it looks like it was a compromise of a clone of the Athearn U30B, designed to fit the same chassis as Lionel was using for it's GP9 - which itself is a clone of the Athearn GP9 shell. I know Athearn's GE U-series have the same problem as their EMDs - the hood is a scale foot too wide for motor clearance. The U18 also has the too-wide hoods on it.
While the Lionel GP9 is similar in many ways it also exhibits a number of differences from an Athearn product - it was a clone tooled up about 1959 after Lionel and Athearn parted ways.
Lionel's GP30 was an all new tool with a scale-width hood done by Kader in Hong Kong and became a Bachmann product after Lionel quit, most recently available as a Spectrum locomotive.
With enough money, anything can be replicated. How deep are your pockets? But why would you want to replicate one of those beasties? They make a CF-7 look pretty neat, which they were- (And I'm well qualified to make that last statement-)
When I was a kid, the CSX ran these uglies along the ex-C&O/PM in Southwest Michigan. They never made it out of Family Lines gray. By that time I believe the windows were plated over due to trailing-only status.
And they were stinking ugly. I remember being in awe of how something could be so ugly.