Hi Alana, congrats on the new store!
I'd be happy to help you out, passing variables off to the checkout page isn't that difficult. I actually just finished a pizza site that lets people design their own pizza on Shopify ( http://rusconi.myshopify.com/products/chef-salad ).
This would, at most take about 90 minutes and I could hammer it out tomorrow. I'm in the US, not a spam bot, and you can reach me at andres@4g5.us