Sorry, Cricket - been offline for awhile. Cream Cheese can be gotten from
Vapor Bomb:
http://vaporbomb.com/E-Liquid-Flavoring-VBflavoring.htm
One On One Flavors:
http://oneononeflavors.com/products/cream-cheese-flavor-pg
I've tried Vapor Bomb's, and it did work really well for me to get cheesecake up to cheesecake, but it's a little pricey. Add it a few days after you've mixed the other stuff (if you're letting it steep for a week or so) - I dunno if they use the same stuff as Faeries Finest Cream Cheese - that stuff was notorious for flavor fade, like to nothing within a few days. I haven't tried One On One's yet, but it's way cheaper (but not as concentrated), and my experience with their other flavors is that they've been quite accurate (enjoying their Spumoni Ice Cream and Root Beer Float right now

).
LorAnn's Cream Cheese Icing didn't get me there AT ALL, and tasted a little funky to me.
That one didn't do much for me either...
Although I use so much Fruit flavor in my Cheesecakes I can't taste much of anything else anyway

.
I really need to try making just a plain cheesecake
without any fruit.
Have you tried using any Yogurt instead, like CAP Creamy Yogurt or Greek? (still haven't tried it myself, too busy lately)
At least the Yogurts don't seem to fade much after steeping.
Depending on the end results, if it's too tart or sour you may have to add EM, 0.5-1%.
(Just some things I've read about)
Real Cream Cheese and Yogurt are close cousins, and Sour Cream fits in there somewhere too I think.
Both are fermented (or cultured) dairy.
Cream Cheese (Fresh Cheese) is made from mostly Heavy Cream.
Yogurt is made from Whole Milk but also uses some heat.
Slightly different culture/bacteria used for each I think.
That's where the varying tartness comes from.
Real Cheesecake (filling part)
also use Eggs, Butter, Vanilla, & Sugar.
(At least for some of the old home made stuff anyway)