I'll show you mine, if you show us yours ... 

Richards-Mason and Model 1871 Open top ... both .45 Colt ...

FINALLY! Transfer approved, package shipped and received, what a beauty! Uberti Mason conversion in .45 Colt, 8", and it works. Arbor too short, of course, typical Uberti, but timing is great, no over travel of the cylinder (I have a new Pietta bolt waiting just in case), fitted a coil hand spring today, using the #10 washer as per Coffinmaker for now, made the rear sight notch a bit deeper, time to go Boom, Boom, Boom now! 

SO............ APP Canadian distributor says they have not had any for several years!  Damnnnnn........!

Try Shooter's Choice in Alberta, their current Uberti page shows a couple of 1871 Open Tops.

https://shooterschoice.ca/product-category/firearms/handguns/uberti/

There were later drives to the Klondike. I have a small book KLONDIKE CATTLE DRIVE, by Norman Lee. I have a friend who knew Lee in person. 200 head of cattle set out from Clinton along the Telegraph Trail with a full classic western trail drive outfit. At Hazelton they sold their horses and excess kit and herded their cows Northward on foot. Horses were starving, but the cows did well! They reached Takla and loaded the cattles on pre-arranged barges on the lake. Ten minutes later they were wrecked in a sudden storm. The men survived but all cattle drowned. They salvaged 15 carcasses and sold them for enough money to take ship to Seattle. Other similar drives were successful. There was a depression at the time, so the gamble was perceived as justified.