loose wheel bearing dust cap

[jks67ss396]

Guys

When i pulled my driver side dust cap off to change the rotor/bearings, i noticed that some of the grease was discolored. the dust cap didnt seem loose, but when i go to put it back on the new rotor, its not very tight at all. i bent the edges out a bit to make it tighter, but cant be 100% sure its a perfect circle

But i got to thinking, could i just put some rtv on the dust cap to help seal it? or would that be asking to screw up my bearings if some got in there?

Its a 71 c10, so i think im looking for the equivalent of a mr gasket 2486/2.180" dust cap. Not really into chrome, so i could strip them and paint them. i saw at least one guy says those 2486s dont fit right.

cant find a new stock replacement

What would you guys do?

thanks