Update, stumbled across this tonight.
958 and 1959 GMC parking light bezel lenses reproduced to exact likeness thru a mold process. $180.00 for the pair. These are clear only and would require a chrome paint finish to look correct. These are an exact duplicate of the original clear down to the "R" and the "L" plus the original numbers! Shipping is $6.10 US only
http://www.patwilsondesign.com/products2.html