Try J & M Communications in North Van.
Phone # 984-7076. They may not have the exact frequency for the partucular logging road you plan on riding, but they would know how to hook you up with that info.
Unfortunately, channels are not what Stephen needs, he needs frequencies.. Just a point of information, but each radio will not necessarily have the same frequencies and/or programmed on the same channel. Your 154.100 (Lad 1) might be on channel 1, where on my radio, I may have programmed the same frequency on channel 4.
I would check with the local shops that program VHF radios. They may have a master list of frquencies used throughout the province. With Stephen being in Alberta he might have to make a couple phone calls to shops here in BC to get what he wants
Have a look at my website; I post the freqs at the end of each trip report; not only for the roads we were on, but also for roads that we passed. Freq, road name, and logging co (when known) are listed.