[214Chevy]

Everyone, I need some help and I’m in between a rock and a hard place. I bought my rear in from Gear FX approximately 2.5 years ago and they supplied me with a certain brand of gear oil called “DRIVEN 75W-140.” I put that in the rear end but I need more and cannot find that weight. Can someone please help me find that as no one has it as I’ve looked everywhere. I’ve called DRIVEN and of course it’s normal, supply chain issues. I’ve called Gear FX and they have since switched to using Mobil now. I only need one more quart, otherwise if I cannot find it I’ll have to drain out all of the new oil in there just to put another brand in there. Gear FX doesn’t recommend mixing brands due to certain additives, etc. Sorry, pic came out sideways...I typed this on my cell phone.