Broke studs on 240z front turn signal housings, are they replaceable?

[Hypertek]

I proceeded to remove the housings from the front end, and broke the studs that mount it to the corner valance. I tried soaking them at first with a penetrating spray but obviously 40+years have been hard on them studs. 

 

I need to replace the passenger side lens anyways, in which I see blackdragon sells them for a good price. But are those studs replaceable? 

[socorob]

One of te pairs I have have broken studs. I was thinking drilling it out and epoxying in stainless carriage bolts in place.

[seattlejester]

^ I believe that would work.

 

If you wanted a more stock look, you could potentially melt the plastic and try and secure another stud in there. 

 

On housing with the rusted/broken stud, I drilled out both and sealed the entire surface of the housing using RTV and put it under compression for a few hours. I had grass growing in mine, so I decided fully sealed may be preferable.