Right now, Fukuyama only sells GP3300's. Like Speedie says, the Power Cube makes for good club level pack for the intermediate racer and great practice packs for the expert level racer. you end at about $29 per pack.
As far as stock goes, Dan's been very busy getting the latest batch of cells ready. They're low on stock on everything right now and they've been working to get ready for the Snowbirds this week. Hopefully in the next week or so, Dan will be stocked up again. You can click the link in my sig to go to the website and check stock directly if Speedtech is out.