Helen ,
Maybe "Peruvian Purple Chile Pepper" would suffice here.
Seeds Of Change has 'em at
Garden Center> Seeds> Vegetables> Peppers> Chiles
or heres the URL (don't forget to wrap it)
http://www.seedsofchange.com/garden_center/product_details.asp?UID=2004031317031123&item_no=S10787
regards
peter g