Here's the link to some on Home Depot that will work:
https://www.homedepot.com/p/Everbilt...2299/207176244
Also Amazon has some that will probably look a little nicer:
https://www.amazon.com/1-8-npt-plug/...F8%22+npt+plug
MIP (Male Iron Pipe) is the thread that fits into NPT (National Pipe Taper), so you can search for MIP or NPT.
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2018 ///M2 LCI, LBB, 6MT...
Current Performance Mods:
CSF FMIC, ER CP, Fabspeed Cat, Aquamist WMI, GFB DV+, NGK 97506, BM3 (Stage 2 93 OTS), CDV delete, UCP, M2C/M3/M4 Strut Brace, M3/M4 Reinforcement Rings