Looks like the update is available now...
Smash 3DS stages - Dream Land 64, Peach Castle 64, Hyrule Castle 64 - $4.50
Smash 3DS Mii Costumes - Pack 1, Pack 2, Pack 3 (assuming Chrom and K Rool come with others in a pack) - $14
Both for $18
Amazon GC only (I don't have paypal)