Plastic Jungle is a bad route to take.

You would be better off buying Amex gift cards and using them over time. This only pulls your spending forward to fall within the required period.

You could also consider SquareUp.com as a means of hitting your spend. It's easy to set up and costs 2.75% in fees. It's not ideal, but you have total control over the process and it works. You can find a review of the service on my blog.