http://zqktlw5bf6oycxq6qod452xnvdfcqhfwliz54bkul736g6b454jrk2ad.onion/wiki/index.php?title=Physical_Interaction&action=edit
Unfortunately, many of these require a shipping address, a photocopy of some form of ID (for their records only, or so they claim), and/or are prohibitively expensive. A few that looked most promising were [http://www.e-fidex.com/ E-Fidex], [http://www.unitrustcapital.com/ Unitrust Capital], [http://www.offshore-etc.com/cards.html Offshore - Etc], and [http://www.cheungandsiu.com/index.htm Cheung & Siu].