I've look on the Hobby Lobby website and I couldn't find 100% alpaca only alpaca blends.
If the yarn you looked at is Yarn Bee Effortless Super Bulky
then it's only 20% alpaca.
An English Knitter (nationality and method).
Feel free to call me either Clutter or Julie (my real name).
FO: Downton Hat
A sweater of a thousand yards begins with a single stitch. Lao-tzu's Granny