I usually get my Bandai stuff in 2-3 weeks from Japan via Amazon
Check all the sellers for a kit on Amazon. Some of them are eligible for Prime, "Fulfillment by Amazon", so you can get them in 2 days if you're in a hurry. They're usually a little higher than the straight from Japan "free shipping" kits, but there's no wait and you can complain straight to Amazon if there's a problem.
I've had good luck from hobby_japan on eBay as well. I usually get kits from them in about 10 days or so, and they combine shipping.