sorry m8, i dont think there is one..... yet... (but not 100% sure)
r4 cards are murder,
endless cards/clones with endless firmware....
my advice to you...
spend ten quid of your hard earned cash and buy an acekard2i.
you can use the same microsd card and alter your sav files so your existing games will work just the same...
you could also maybe punt your r4 card for a few quid...