My left rear reg died the day after Xmas as was headed to Tahoe to take daughter to play in snow. Was raining at the time and of course, the window died in the down position. What else?

Took Gma's car instead and parked mine in their garage a couple of days. Later, got the door panel off and the window raised and shimmed closed using wedges. Now is time to repair.
The regulator (and mounting to the motor) is attached by 4 very heavy rivets.
Has anyone used SS machine screws and nuts to install a new reg rather than the rivets? Am thinking it would be stronger to bolt in place with lock washers and loctite and then buzz off any protruding threads than to go out and buy a heavy duty riveter that I would only use once.
Comments?