We are very spoilt with how we can communicate, and it is very frustrating when we don't receive answer to what we view as a simple question after the standard 3-5 working days.
If you really like your Lionel, I would persevere with trying to get the specs you want. Again, we are spoilt for choice with basses, but if you like something the patience might pay off. I would try either GuitarGuitar or Classic & Cool Guitars as they might have encountered your question before and have an answer, or have a better line of comms to Sandberg.
Might not be a quick answer, but it might get you what you want in the long run.