I agree with the others that there is no such 3T bar for which you seek. The shape of bars from that era is just wrong for modern brifters though some are better than others.
Soma Highway One's are comfortable & look the part. Mine are 31.8 & undrilled. I don't know that I'd be inclined to drill holes in a handlebar; An awful lot rides on them.
What's wrong with running the cables under the bar tape? I'm afraid I don't understand your motivations.
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I shouldn't have to "make myself more visible;" Drivers should just stop running people over.
Car dependency is a tax.