Type S lime for cob raised beds

A few years ago I built 3 long raised beds from local clay, sand and straw. These raised beds have performed very well in my climate (Yukon, Canada) because they act as a solar heat sink and temperature modulator. The ground stays frozen until mid May here.
I also filled them with rotten wood and inoculated them with IMO. So it's an experamental, hugulculture, korean natural, natural building type of thing. Wild. And wonderfull.

But... they are weathering: erosion and freeze-thaw are doing a number on them. I expected this as cob is not a weather resistant material. What I didn't expect was how hard it would be to source quick lime to make a lime plaster.

Does anyone know a company to source bagged dry quick lime or buckets of putty from?
Also: how much lime does one need per sqaure foot/meter whatever?

I am also looking for sources of lime for making plaster. This post came up on a search for quick lime and I am rather astonished that it doesn't appear to have any responses. Hard to believe no one here knows of suppliers for quick lime.

Is this the stuff?  I think this is what I used to limewash my rootcellar...


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