Follow this link to the Starch-Free Bakewell Baking Powder:
They also have a safe "Baking Cream" that is vegan and starch free. The original is advocated by King Arthur Flour Company.
Since the smallest amount these products come in is 8oz, here is David Lebovitz's blog post on how to test if baking powder is still good:
Perhaps order a package of each and split with friends? I am...once I can be active in the kitchen again. Will have a firm answer by Nov. 22nd on when and how my wrist will be fixed. Until then witcherly ideas and confections will keep circling 'round in my noggin.