05-08-2014, 09:47 AM
The best choices for modern boxcars with opening doors would be some Athearn RTR. This would include their XAF10 Railbox and their double-door IPD lumber cars -- those Railboxes went to Class Is in the 1980s, but some are still around either patched or in full Class I paint. Your best bet on these would be eBay or swaps.