BlueProton is an official Kobo partner in the US. It's listed on Kobo's website in the "where to buy" section, along with Walmart.
I agree that the angle of the sleep cover origami stand is not vertical enough. You can compensate by putting an object underneath the stand to make the Libra closer to being vertical, or you can buy an adjustable reading stand like this one:
https://www.amazon.com/dp/B006ZT4VA0/