It won't do the OP any good, but just as an aside, it's too bad Moondog Express is gone. They went out of business about 20 years ago, now. I remember buying some of their O gauge ties, which were black and made out of hard rubber. Really looked and worked great, although a bit on the pricey side. They also did a periodic publication for their products and other things. The page of one of the pubs, shown below on the left, shows an ad for their RR ties.
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