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A gluten-free ex-matzoh ball eater has enthusiastically recommended Lieber's Knaidel Mix as a matzoh ball substitute. It's available from http://dietaryshoppe.com/
I've got no connection to this product or vendor, but I trust the recommendation. Sure it might be a little late for use this year, but think of it this way: it's very early for next year (when you can enjoy it in Jerusalem).
Hot Cross Buns (from El Peto) are also available from the folks at The Dietary Shoppe, Inc..
David
* Visit the Celiac Web Page at www.enabling.org/ia/celiac/index.html *