firefighterchallenge.com web-site sells the sled. go to the store section and click on equipment where it says browse by category. the price is about $2,500 so the railroad tie may be the way to go for individual training...
so its recomended if your on a budget to build your own out of RR ties instead of buying one because i might deside to get one to donate to my firefighting class at school for us to train on with our competitions we have.