LOL 
I don't have it. Not sure it's been published. Isn't it just the RH of 25/6 in the RH and the LH of 10/12 in the left?
indeed.
if it's on paper it may very well be in 'manuscript' form. i've never seen them anywhere. many interesting and somewhat 'rare' studies and variants on chopin etudes and other works have it, but this one dear sir, i unfortunately have not.
also, be careful about typing my full username, i use the abreviated version for a reason. i can't say publically but you might be an errant keystroke or two away from some top scecret government encryption or password primer. just a heads up, i don't want agents coming to your house (they have your IP address) and taking your computer or puting you on some 'watch list'...