He (CSI) had plenty on his website unless they sold out. I would never recommend buying from glo as they stole $1200 from me but he had some posted for good while, and everyone is getting their orders for the past few months. You will also wait 3-5 weeks routinely for your order. Check breedersdirect speakeasy seedbank and generally where ever else he sells to.
1 million % order your CD gear from Topdawg. Pro tip since I bought all I can and am ever willing to...Chem of the Crop if there are any packs left that is fuckin killer. Topdawg spends way more time narrowing down the gene pool with great selections and breeding with his chem crosses (csi is providing sort of a fountain of youth gene pool better for breeders less average grower). It is his specialty after all. You can find some good stuff. If you want the best GSC just buy the s1's. You'll find a killer keeper tailored to your taste of cookies pretty easily.
When I emailed he said it was an cut handed to him only by the name OG kush and it was a very long time ago when og was first hitting the scene in Cali.