Q: lost my iWorks'09 in reset, any way to get that version again?

From the discs that shipped with your Mac.

If you got it on a DVD or with a computer that shipped with 10.6.8 or earlier, install it from DVD.

If you got it from the Mac App Store, try following these instructions or contacting Apple.

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Once you reinstall from the iWork '09 DVD, you should consider applying an Apple updater to it. These updaters are not for iWork '09 applications that were individually purchased from the OS X App Store. The updaters provide additional features: 1) full screen support, 2) autosave, 3) versions, and 4) resume.

1. OS X 10.6.6 - OS X 10.7.5
   1. Apple iWork 9.1 updater
2. OS X 10.7.4 - OS X 10.11.5+
   1. Apple iWork 9.3 updater

As the iWork '09 DVD was a retail purchase, any such disk that shipped with your Mac would likely be a timed trial DVD, and it may timeout with no means to activate it as the Apple servers for that purpose are long since gone. If that is the case, then there are retail iWork '09 DVD still available via Amazon and Ebay resellers.