T.
However, this eBay seller has replica antique-style plugs with polarized prongs. Polarized prongs are not necessary on a radio of this type, but, if preferred, these plugs will keep the radio looking complete and attractive.
http://cgi.ebay.com/2-BROWN-ACORN-OAK-LEAF-BAKELITE-PLUGS-ANTIQUE-LAMP-FAN-/110661792466?pt=LH_DefaultDomain_0&hash=item19c3f4f2d2
She seems to have many different styles, including white.