theres a 60-66 truck running around my area with them on and i think they look really good! i bought this one on ebay for a 3rd brake light in my car project! i searched for info on them and only found a little bit. mines a Do-ray no.410 there is other company's that made same style or a little different like cabco. no.410 and yankee 77 model... forgot some of the name's.the o.g. ones were glass lens and came in red or amber.
the one's you have pictured..is either a CABCO. NO.410 or a DO-RAY NO.410, I believe DO-RAY was the replacement for the cabco. after they went out of business or the other way around.
Taillight king had some for sell at one point.you have to goto the truck and trailer section and then to Amber/Yellow Miscellaneous Odd Shaped part and scroll to the bottom to see the cab over lights:
http://www.taillightking.com/
here's some pics i found:
http://www.taillightking.com/images/...hromeBezel.jpg
http://www.taillightking.com/images/...hromeBezel.jpg
and someone that had some for sale but dosent look like they have any anymore:
http://www.rpmmotorsportsmn.com/serv...AB-ROOF/Detail