Also note that trans-fats are naturally occuring in low amounts. I know on my bar of cheese, 30g has 0.3g of naturally occuring trans-fats, same with your beef. Due to labelling loopholes, I think the US may allow it to be labelled trans-fat free is <0.4, luckily Canada doesn't allow that anymore.
I 2nd the suggestion of Natural PB, you will adjust to the taste quite quickly. As a treat, I suggest cashew butter, or for a slightly cheaper alternative (yet still more than Natural PB) try almond butter.