They are not mine but I saw them and they looked interesting.
I have never seen Rainbow blanks before
http://cgi.ebay.com/8-WILCOX-GAY-RECORDIO-DISC-Blank-RED-w-Sleeve-Record_W0QQitemZ270334199139QQihZ017QQcategoryZ306QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.com/Blank-78-RPM-record-for-recording-Rainbo-Record-MFg_W0QQitemZ250361668168QQihZ015QQcategoryZ1442QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
http://cgi.ebay.com/2-Vintage-1940s-Blank-Record-O-Graph-Records-4-3-4-In_W0QQitemZ200285511559QQihZ010QQcategoryZ306QQssPageNameZWD1VQQrdZ1QQcmdZViewItemQQ_trksidZp1638Q2em118Q2el1247
Ebay-interesting blanks for sale
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