Ive heard Neem oil is perfectly fine for Cp's, so you can gladly use this.
Many people also dunk their VFT's, they fill a bucket with pure water, unpot the plant and literally drop it in the water for a few hours, the VFT's come out just fine and the aphids do of course drown.
Here is advise from the Cobraplant E-book:
"A systemic insecticide will take care of the aphid problem very easily. We use Ortho's Systemic Insect Killer. It lasts for a month, and it doesnt harm the plants in any way. Cut off any affected leaves and look for new growth."

Cheers

Sheldon

i snipped off the most heavily affected pitcher, but i know that won't be enough; i will take a crack with the neem (lightly). thx!