Old Aluminum Window T-slot

I'm looking for replacement weather stripping for some old aluminum windows (it's a rental or I'd change them completely).

You can see in the photos that the stripping that is in some of the windows is an odd t-slot shape, with a sort of curved bit angling off from the t-attachment to wrap around the edge of the window where it contacts the frame. The width of the t-attachment is 1/4" and its thickness is about 1/16". When extended straight, the curved bit is 5/8".

I also included a photo of the t-slot itself. The width and thickness of the slot is as above (1/4", 1/16", respectively) and the area in which the stripping sits is about 1/4" square, not including the base area.

I'm not set on having the exact same kind of stripping, something that fits and will seal will do just fine.