CMC supplied 18 wheeler universal bee hive clearance lights (made by Signal STAT). Can't recall the # on the package (10M for amber plastic lens) - maybe Gordon has it? I had issues with CMC sending me 2 that matched. I'd get one with a plastic lens and one glass. One flat and the other Lady Gagga. Rather than return - I had them send more until I got a match! I never used them - a match was with crappy plastic lens.
Instead, I used Lucas L594 (?) AH/TR assemblies with clear glass lens (amber and red available too - as well as plastic repros). Available from Moss Motors for $30 each. They are perfect size - see my avatar - clear lens with amber bulb. I should have used the ones with 2 filament bulbs - one for turn and other a running light.
I have spare set of NOS VS front turn signals - not sure if they have clear or frosted lenses. Like first ones shown in DrClock's photo. Never used - got from Carlisle event.