I can testify that the bolt size for the 5th Gen is M8 x 1.25 x 20mm. Just installed the OEM skid that was missing that I got from a member on another forum.
If you want the factory bolts the P/N has changed to 90080-11373. You may need the bolts that connect the plastic piece from the bumper...
I am with you.
This has been such a long ongoing issues in cars you would think that QA would be a forced issue on this company. You would think that someone else would have seen the need for quality airbags and started making bank!
As for your ride, if you want to get rid of the thing I will...
Does used skids count since mine are missing? After that will be some Husky Mats. I need to pay this T4R down before I start serious mods like roof rack.