Nope, looks like it was the only one for sale..... If there were any more in existence and/or for sale, I think Google (I check around pretty much everywhere in the net everytime I take it out of my stash, when doing my inventories and storing newly aquired stuff) would have revealed it to me these last two years I've owned it already......
I have not tried tried it out yet because of the slight glue repair I think I need to do first at the owe side potion of the cover....have to figure out which glue is best to use....