Stolen German Bike info??

For the Guru's out there. I've recently had a bike stolen from my garage and my insurance want more
info than I've got about the level of this bike and a current equivalent replacement.

The bike was a steel (Full rigid late 80's early 90's ) Made by a german company called Weltkrone
(World crown) It had a triple Biopace crankset. Shimano eXage Country groupset (Canti brakes, Thumby
shifters, rear indexed after a fashion!)

Fairly Cross country in geometry

anyone have an idea of what level of modern bike would be an equivalnet? My insurance are just
shrugging shoulders..

thanks In advnace