>>1472970There's plenty of stuff on Ebay/Shapeways etc, a lot of narrow gauge stuff which don't really need chassis if you don't want to run them.
>>1491462I've done a couple of these kits, they are fine for the price but they do leave much to be desired with detail compared to modern standards. There's a long old thread on Rmweb about bashing these kits.
With scratch building, I've heard a lot about pic related & Railway Mania on YouTube has a lot of scratch building which is kinda interesting