Simple Attenuators - Design And Testing

[BlueX]

I'm having issues finding the inductor, plans call for a .9 mH 18 awg wire.

Can someone share a link or part number?

I've used this one, but availability can depend on your location:

Jantzen Audio, 0,900 mH, 17 AWG (D 1,2 mm). Two different spool sizes: 000-1413 (OD 45, ID 25, H 30 mm), or 000-1566 (OD 52, ID 20, H20 mm).