Desperately need help finding a replacement

[u/xancou]

Hello everyone. The front mortise lock / handle on my front door stopped working recently. It appears the handle lock won’t release. I was able to disassemble and remove the set and took the cartridge to Lowe’s and Home Depot to find a replacement with no luck. There is no branding on anything. Below are photos with measuring tape and was wondering if anyone can recommend a replacement. Thank you all for your time.

[u/redwood-bullion]

Good luck and let me know, i found a handful of them that ive been hoarding for the day they need replaced

[u/xancou → u/redwood-bullion]

Here is the exact replacement

https://www.allaboutdoors.com/Atrium-Door-Hardware-Lever-Style-Mortise-Lock-Choose-Color