Finding old versions of iPad apps

Want to get an old version of Pages from an iPhone 4 (ios7) onto iPad 1 (ios5)but my iCloud and computer both have newer version of Pages for my iPhone 5s and I am pretty sure it will overwrite the old version of Pages. Also looking for a place to get older versions of google Docs & Sheets. The answer here: Finding old versions of iOS apps (for 5.1.1 on a 1st Generation iPad) does not work.