.... you can wled broken track parts indefinitely and use hard facing on the running surface.
If you have a look at this URL;
http://www.multimap.com/map/browse.c...x=4&right.y=92
... and note the 'dismantled railway' legend on the map. The Alligator was sitting only 20 feet north of the original railway trackbed in a chicken yard ( I kid you not) associated with a second (third, fourth...) hand plant and equipment dump which I think was between 'Mains of ... ' and 'Duntanlich' It might actually have been along the line in either direction, but it was definitely just off the old railway trackbed south of the A95 between Crieff and Perth. The road is 17 miles long and the track is close to it for less than half of that. Now if only Nigel was around these days as it's closer to him than me. It will have shifted by now as I didn't see it last time I looked, but it might not be beyond tracking down.
Gordon