Sulis,
This is just a thought, but if you wanted to leave the Sun card in your deck, perhaps you could use the Sun card from another deck to put in the center, or anything else symbolic, like a small golden/yellow crystal sphere.
Disa,
Thanks for your comments!
With Winter Solstice only a week away, I thought I'd revive this thread. See link in the first post for a Summer Solstice spread for those who live in the Southern Hemisphere.