Adjusting the center of a radial gradient

Hi Illustrator experts! I am at a total loss for this one. I have a logo design for a client that uses a complex background. I started with a file they chose from a stock agency and heavily modified it. The original file had a mesh under the image, but I don't want that in the final logo (I need it to be transparent), so I moved the bottom line of the box up by adding anchor points until it was hidden under the swish and the words "Through Horses" — in doing so, I moved the center point of the gradient. Apparently, the position of the orange in relation to the letters and the horse is extremely critical to this client and they want it moved back.

I need to be able to shift the center of the gradient so it falls in the same place as before OR I need to know how to make the knockout transparent.

In screen shot, top logo shows where the gradient is now, bottom logo is where they want it.

Can anybody help me?

Thanks

Kim