Maggs, have you considered an intermodal option? TransX could probably do it or even CN Intermodal for that matter. CN's intermodal prices look good. For some reason, you seem to get a better deal on Monday or Sunday ($2,155 vs $2,597) than you do for the other days of the week and the price only goes to 40'...and I know I've seen 53's on their container chassis before. CN allows up to a maximum of 65,000 lbs for a trailer or intermodal container bigger than 40', so your weight is okay for them. I can't find a domestic dangerous materials fee. You may want to contact TransX and Vitran, or even Western Canada Express.