I'd skip the fiber optic in that case. You can hardly tell it's even lit. Shouldn't be hard to rig in a small bulb though.
The repro Chevelle parts vendors have that fiber optic available for about $10. You get the line and a special socket attached that simply replaces one of your speedometer lights. When your speedometer lights up, that light is transferred down the line. I doubt they ever used this on the trucks though.
Yesterday I completely removed my cigarette lighter and it doesn't have any light.
Looks stock to me.
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63 Impala*66 Chevelle SS*69 Chevelle*69 C10 Stepside*71 Cheyenne 20*72 Chevelle
Parts for sale:
http://www.angelfire.com/trek/mr409/items4sale.html