I had a recent conversations with a friendly rep from RMT concerning an order and it appears that there is a finite supply of old KLine stuff that is sold under the OLine label (yellow and black boxes). Everything over the last few years is old inventory from Chinese warehouses. Nothing new is being made.
I had redone my 12' by 9' layout with old KLine supersnap track. If I ever plan for any expansion I'll have more and more difficulty in getting additional tracks, especially curves. So if anybody needs any KLine beter get it soon.
JohnF