Just a bit of background on Bill Peters, the guy behind HSRR.
His primary busines is Sn3 narrow gauge model railroad items. Check out the website,
www.p-b-l.com, for a look at his offerings. Very detailed offerings in what had been a provence of scratchbuilders. He is the man behind Sn3.
For detail, that HSRR was well ahead of it's time.
I don't think they sold well, and it appears they were sold off en mass.
A friend said he came across Bill many years ago pulling a real McLaren on a trailer.
That friend is a Master Model Railroader (NMRA designation). When I told him about the HSRR cars, he immediately said "Get me one!".
I did.