Try 55396:38012 and 55396:38002 on the DLS, also 118723:2025 for double track. The ones on trainzone are (IIRC) a re-skin of the first two.
QR use 3'6" track, which would be a little wide, but might not be too obvious in a tunnel. If you find another tunnel you like, you may be able to alias it with suitable track (though you ought to ask the tunnel's creator first.
Merry Christmas,
Paul