If you can do icing image cookies, I have a couple of celtic knot designs I can share. There is also a set of celtic knot patchwork cutters on Global Art I am thinking of buying. Here is the link to the cutters:
http://www.globalsugarart.com/product.php?id=18295
PM me if you want the designs. HTH
I found some stamps and stencils. For the stamps, use a shortbread recipe (or NFSC and omit the baking powder.) You can brush them with a little lustre dust to "fancy" them up.
Celtic knot cookie stamps and stencils:
http://www.rycraft.com/Merchant2/merchant.mvc?Screen=CTGY&Category_Code=New
http://www.lythastudios.com/misc/celtic/cookie.html
http://www.designerstencils.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=DS&Product_Code=C317&Category_Code=
http://www.designerstencils.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=DS&Product_Code=C295&Category_Code=
Other stamps:
http://www.rycraft.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=CS435&Category_Code=HC012&Product_Count=11
http://www.monasterygreetings.com/productimages/item2758_cookie_stmp.jpg
Celtic cross cutter:
http://www.coppergifts.com/productcart/pc/Celtic_Cross_Cookie_Cutters_CG2210.asp
Irish cookie recipes:
http://www.littleshamrocks.com/Irish-Cookie-Recipes.html
I know these aren't what you were asking for, but I just had to post the links.
Claddagh cookies:
http://www.weddingfavorsunlimited.com/claddagh_wedding_favors.html
Irish dresses and they are pretty amazing!
http://www.kerryschool.com/images/main_gallery/Irish_Dress_Cookies_-_Now_That_is_Dedication.jpg
I just posted some I did with the stencils in the gallery.
Should be able to view them soon.
I just posted some I did with the stencils in the gallery.
Should be able to view them soon.
Just took a look. Your icing is sooo smooth. Very pretty cookies. 
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