Hmmm... I cannot seem to find one online. Could it be discontinued? That would be strange, as well as sucking profusely, because it is such a kick ass piece of gear. I think I paid about $30 for mine from Musicians Friend. It's worth a lot more. All it is is a unlatched switch. Don't know if the Fostex 8051 has anything special to it.
I layed down 4 bass tracks last night. I fumbled a run on one track, missed a string on another, fretted a wrong note on another and missed a beat on the last one. I went back and punched it. You cannot tell it was done. That footswitch is the BEST thing I have plugged into my VF160. It will save tons of time fixing small mistakes.