Hmm, I think you need to spend @ 200k Poki to unlock the catalog from Wardell. It might be a little less but it's definitely 6 figures. Once unlocked, you'll find a novelties tab in the catalog with all the Paradise Planning merch.
Just keep doing homes, you'll get almost every item from Wardell the more homes you do ... If you spend 150,000 Poki, you'll unlock a catalogue that you can buy them from ...