At the risk of opening a can of "electrical" worms (opinions) I would suggest using a standard used rectifier and the original style battery
http://www.ebay.com/itm/New-NOS-Wisc...c7305c&vxp=mtr
Based on personally building four CA95's and three CA160's (and one waiting to be assembled) I have never had an electrical issue using standard parts.
I feel that upgrading the rectifier and battery type sounds logical, but in my opinion, one cannot buy a new saddle for an old horse and expect new horse performance...