Absolutely
Those thing that may/have disappeared from the market, I have about a two lifetime supply.
Kinda funny, I actually don't use any mods or toppers that would be easy to find anymore.
It's all so ......... 2012

But that's when I saw the need to stock up for the Epochalips, so I did.
I had one main criteria when I started to stock up, and that was to only buy products that would stand the test of time. Regardless of how nice a product looked, if it was something that would not be sustainable like forever ... I didn't buy it. Never did any of the ProTanks or subtanks or any of the mods that were here today & gone tomorrow. I only stocked up on those mods & toppers that I knew would still be serviceable long after I'm gone.