I appreciate your weighing in on this. However, two things:
1) I already heard from Jim Finn who had the part available and I confirmed his sale to me. If all goes well, I'll have the replacement installed within the next 10 days.
2) My Buick dealer advised that he had a door handle break on his Park Avenue. Said he replaced it with an aftermarket part and the aftermarket part broke within 6 months. Caveat is that aftermarket not as good as OEM.
Rest assured, though, if Mr. Finn did not have the part, and I was against a "rock" and a hard place, I'd surely go for the Rock Auto part. The alternative is getting in the passenger side, leaning over the console and reaching for the inside door handle to open the drivers door. My wife usually got stuck for the latter, and she ain't too happy about that.
Thanks again.