Post-Assembly T-Slot Nuts local?

X-Carve Parts & Files
1

Has anyone in the states been able to find insertion or post insertion nuts locally? If so, at what store? I woke up wanting to work on a project, but don’t want to wait a week for shipping… don’t think my motivation will last that long

2

80-20 has them (in many flavors)

3

I saw them at Fastenal.

4

I see them on Amazon and different places, but what series is the T-Slot Extrusion? I see nuts for series 15,20,40, etc Does anyone know which ones to get?