I am able to source leathers from the same places that she does, but I don't.
I source my goatskin (as seen above) from France, as it seems to be consistently of higher quality than anything else I can find. Part of the reason that I don't source the same leathers she does is because she only sources calfskin. I personally vastly prefer goatskin (for interiors and lining especially) -- it has one of the highest ratios of weight to tensile strength, which seems to make it pretty resistant to over-stretching on areas such as card pockets when it's tanned well. The specific type of goatskin you see above is most popularly known as Hermes' "Mysore." I really like it. It doesn't patina nearly as much as a lot of the other stuff I use, but it's seemingly impervious to light use, scratches, etc.
The leathers I prefer (outside of exotics) include: Italian Vegetable Tanned Shoulders (Buttero), German Shrunken Calfskin (Hermes Fjord), the goatskin mentioned above, Chèvre de Coromandel (another Hermes goatskin), and Italian Box Calf.
Less regular suspects include Novo Nappa, French Baby Calfskin, Softer Italian Calfskins, and Kangaroo Hide - all of which I love to work with, but are somewhat more difficult to stock reliably (I'm a really small fish to most of these tanneries).
Exotics are another thing entirely, and are handled on a skin by skin basis depending on the size/color needed. Generally, I am able to get my hands on exotics without any issue.
do you offer beavertail leathers?