Hello "STLSF4003" :
A spline of only sleepers or ties, without rails, with 3 feet track markings, maybe available at DLS in a few days or weeks, depending on the tests and the time of making the objects.
In short, it would be a large set of sleepers, rails, short sections of used track, and abandoned and unused track objects, for various track gauges with a build 3.7