For CRISPR/Cas9 research, one the most important parts is the 'plasmids'. You can just purchase the plasmids you want and then do some simple work (place in your own short sequence) on it later. Then you are ready to go.

Addgene (a non-profit organization) has continuously collected CRISPR-related plasmids around the world from different labs and different research fields, including mammalian, plant, yeast, bacteria,.......etc. [ https://www.addgene.org/CRISPR/?gclid=CjwKEAjw7MuqBRC2nNacqJmIpT0SJABQXAOt3LhgfBuP8g7h50DAOAWFMKnF4pcV98FdQWpRaS7EKBoC85Hw_wcB ]. 

You can look through their collection and choose those plant plasmids you want. They ship them internationally too. For ordering 1-5 plasmids, each is $65 (USD) + shipping fee ($45 internationally). See their price list at: https://www.addgene.org/ordering/#pricing