Live Webview in Keynote 6.5.3

I am using OSX Yosemite on Macbook Pro 13inch. recently purchased Keynote 6.5.3(2151).

I want to show live Webview in my presentations e.g. create a kind of of Audience Poll application using Keynote 6.5.3

I gather from the forums that this feature was there in older versions.

I need help w.r.t.

1. Guidance on which version of Keynote I Should use to make the Live Webview work

2. How to buy old version of keynote from applestore?

3. Any other alternative for my requirement

Thanks a ton in advance