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If you are familiar with HTML, you can go to your current theme directory and edit what you like from there.
The theme system for XOOPS is quite easy to modify. You can find your themes in [xoopsRoot]/themes/[themeName]. The file you need to edit is called theme.html and you can also modify it's attributes through the included .css file(s) for what ever colors and table spacings you may need.
If you still would like someone to make a theme for you that's perfectly fine so long as you get an offer. I pointed this out to you in case you find a theme that you prefer and would like to modify it yourself.
Good luck, and happy Xoopsing!
Cheers!