If you cannot find them pre-packaged, a local butcher can often prepare them for you.
Availability in physical stores is hit-or-miss and often depends on the region or specific branding.
: Frequently stocks OriginAl's smoked chicken ribs in multi-pack sets (e.g., 3 lb or 4 lb quantities).
: Stocks them occasionally, typically under the Kirkwood brand. They are often found in the fresh meat aisle rather than the frozen section.
: Mention you are looking for the "spare rib" style cut popularized in Australia.