Herb,
As much as you're enthused and determined to find a recording of the Wöss piano reduction of M8, I hate to say it, but I don't think you're going to find one. There simply isn't enough demand to justify the expenditure for such a recording, unless you're willing to pay a pianist willing to learn/record the reduction, plus a recording engineer to do the recording. I can always be wrong, but that is my opinion.
Even though Franz Liszt did a masterly job transcribing the Beethoven symphonies for piano, I have seen only one recording of those transcriptions (I think it was the first ever done), and at that, it was quite expensive. From the sample I heard of the Eroica, I felt the expense unjustified for the set.
Wade