Need help, erased data in TWRP now no files to flash

Stupid me, I think I made a boo boo, and need some help please.

I followed these instructions before installing a new ROM I wanted to test out;

Wipe In Recovery
-Wipe -> Swipe to factory reset (3x)
-Format data -> yes (3x)
-Advanced wipe -> check all boxes -> swipe to wipe (3x)
-Go back one menu -> Swipe to factory reset (1x)

I did all of that, went back to Install in TWRP, and none of my zips are at the bottom of the list anymore :( oops. Now what ?

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