If you really can't find a whammy bar replacement, you can do this.
Check if your current bar holder can be removed. If it can be, chances are, the schaller arms (with arm holder) at Davis can be used to retrofit your floyd.
a few shops i recommend:
guitar connection - might b a bit xpensive
davis - try there 1st
guitar workshop - 3rd choice
swee lee bras basah - i know if they have one that fits, they sell it for $5! no kidding!