I'll make the same offer again that i've made in the past...if somebody is willing to do the graphics and maintain the skin, i'll take care of the xml. I honestly don't have time to take on another skin; but i can adapt the xml in the 1280 skins fairly quickly to 1920x1080.
Depending on what skin you are basing your work on, i would start with references.xml. All your basic images should be listed in there with their size; various buttons, listcontrol rows, etc. Basically look for anything within the tags texturefocus and texturenofocus. MP doesn't do a bad job or resizing them on the fly, but if you want a clean, consistent looking skin you want to resize these images in paint shop pro or photoshop to what's specified in references.xml. Even tho these files make up only a small part of the total number of files displayed, they are the ones you see most often.