JPEG to EPS Cover Conversion

I have a batch of audiobook cover images in JPEG format that now need to be supplied to our distributor as EPS files. The only technical requirement is size: each finished EPS must be exactly 4 000 px wide (height can scale proportionally). I do not need color correction, cropping, or any other edits—just a clean, loss-less conversion that preserves the original look.

Please return:
• One EPS for every source JPEG, keeping the original file names.
• Files saved in RGB, ready for digital use.

If you can turn these around quickly while hitting the 4 000 px spec precisely, I’d love to get started right away.