Well this is a pretty old post, so hopefully you've already found a 1.7 iOS player. Just in case though, here's what I do. Unfortunately I don't have a 1.7 player, but what I do instead is use splashtop remote to connect to my computer with Hava installed and play it that way. If you're not familiar with splashtop, it's a remote control app similar to VNC, but the performance is FAR superior. The playback is actually smoother than using the vulcano player on the ipad (with a Hava, not with a Vulcano), and the display is much sharper since you're actually running the hava over the lan rather than remotely.

What you will need to do this is a fairly fast computer (since it will have to be running both splashtop and Hava), and a pretty fast internet connection if you want to use this method remotely as it uses roughly twice the bandwidth as using 1.7 with your Hava. You'll have to install the splashtop streamer on your PC (the streamer is free), and purchase the splashtop app from the app store (usually about $5). There is also a free trial version which disconnects every 5 minutes if you want to try it out first. Obviously your computer will need to be on in order to do this.

I now have a vulkano flow so I use that player on my ipad when I'm watching the vulkano, but I still use splashtop when my wife is on the vulkano tv and I have to use the hava. it's a great app and well worth the $5. There's also an Android version for those of you with Android tablets or phones that don't work with the Android player.