You might be able to do that at CDJapan if you choose the pay by Paypal option? I'm not sure if they allow payment via Paypal for pre-orders. But they're more expensive compared to most other shops and they have a pre-order deadline.

Or maybe you can try Play-Asia. You can set e-mail alerts when pre-orders open or something. You also pay immediately if you choose to pay via Paypal, but again, not sure if they allow that for pre-orders.