Go to the main page of the New Members section and use Search Forum to search for Tobacco then read the threads where others have asked the same thing. You'll find a lot of suggestions.
In reality, no ejuice really tastes like a cigarettes because cigarettes are burning the tobacco and you are also breathing in Co2 and about 400 chemicals pesticides. So you aim for something that smells like smoke and the cigarettes you liked and has some TH. You could start by trying ones with names similar to the brand you smoked. And I also recommend you try some Turkish blends (Camel-alike juices, Desert Ship, anything Turkish). Go look at Freedomsmokeusa.com in the tobaccos section - lots of choices (and some are also available as 24mg 3ml samplers in the samplers section). For the standard tobacco section I recommend you try 70pg/30vg or if you want more TH maybe 80pg/20vg.
I like their Desert Ship. A couple of other good flavors to pick up might be vanilla (or their oRYental which is a vanilla caramel tobacco) and chocolate - I use those to flavor my plainer tobaccos juices sometimes, and sometimes I want something sweeter and just vape oRYental.
Most of the time, code freedomsmokeusa will give 10% off and they usually throw in a random free sample when I order juices.