I orded some 15mm wide generic batten from my local chandler and he threw in some end caps not the Hobie cleat type end caps but heyho.
I lost batten 2/4 and 3/4.
Cost for 3 meter of batten £2.50 (I'm in the UK) the Hobie battens though more desirable are around £20 each so around £40 plus delivery for the two. These are probably much cheaper in the US. I will probably end up buying a complete set but the above for now works perfectly fine.
I am a complete newbie and I had my maiden outing yesterday. An amazing experience.
I hope you enjoy your Hobie