Hy Leo, it's been a while, thanks for the offer, I will call you and find out, those bumpers make the car look much nicer, I agree about dorks, that is why I park away from crowds, I do not care if I have to walk 2 blocks, but I avoid mall parallel parking and crowded streets. Those 5mph bumpers are sturdy, but my concience will not allow me to live in piece , it is just a case of doing what I want or doing what must be right, I will go for the small bumpers, I've been bumperless for several years now, lucky me nothing happened. On the contrary, yesterday as I came out of Torrance library (checking the internet), as i walked to my car(across the street, like I said, avoid parallel parking), 610, enjoying it's look, I saw in horror my driver side door, all smashwed up! Man! I saw red, I was ready to take on a rottweiler baretoothed and beat him up! GRRRRRRRRRRR!!!!
Well, I was so bummed that I remained motionless for about 5 min, brainstorming out, when , how , why, who??????
....untill I realized that ding(it was no ding, it was a DONG!!!) was not there before, and asked a guy in a house about it, he was really nervous and said, well, let me ask my wife, and he run away, ...well, I went on and talked to another person watering the lawn, and he said he did not see anything, as I walked back to my car, looking cool as a piece of ice, but melting inside like a dormant volcano, I realised the way it could only had happened, somebody backed off a driveway and hit my door in, and the nervous guy's home was right there, and a utility truck parked with its's tail inside, suspicious enough(park mode plus owners attitude), so I went again and talked to the guy, he came out, and I told him(made that up to force him to say something) your neighbor told me some cars came out of this driveway, and that he saw some contact happening, to what he said again, "let me ask my wife, she is supposed to be out here"...
...then he said, "my wife says she might have done it, but she does not remember"...
...ya right , so I say, let's check out your truck, and , on his passenger side rear bumper corner was my orange 610 signature, it was his wife who did it, and he knew it, they parked the car rear in to keep me from seing, and expected me to just drive away. Well, to make it short, I got a hold of his insurance, so he will report it and I will take it to a shop(got an estimate from performance body shop in Lomita BLVD, Torrance) I want it fixed, I want no cheapo money nor bondo job, I want it back to what it was, pristine door.
Well, all I can say is that my enthusiasm for my Datsuns saved me, I like parking my car (s) far away, so when I go back to it, I can see it from far, and that allowed me to see the damage. It hurt me more than it hurt the car, but at least I got the culprit. When it comes to my cars, I become a Neanderthal man!, do not mess with it, my Neanderthal blood comes out as hulk's green blood does!

Matt, thanks for the parts help, thanks for your support.

Later____________________