RCM has/had plans for "Loaded Dice" ( .60 size/66" ) and "Loaded Dice II" ( .90 size/68" ).
http://www.rcmmagazine.com/store/sto...5GvCSYUTI6k9d6
http://www.rcmmagazine.com/store/sto...5GvCSYUTI1g7X3
I have had plans and cores for the .60-size and hope to build it in the coming months.