If riding something like a wave, you'll save yourself a load of money if you just come here and buy a Chinese knockoff at the secondhand market in Mandalay. Ride it to death and flog it off when you leave. Buying it won't set you back more than about $300. Quick sell when you leave will probably get you about $150. You lose $150, tops. A far sight less than just what the permit to bring yours in would cost you.