Hey, I'd love some. Don't have any sunflowers to swap, but I can offer you chilli seeds (jalapeno and cheyenne), which grow well indoors in a pot, marigold seeds (tall orangey coloured ones), gardeners delight cherry toms, miscellaneous poppy seeds (red and pink, some double, maybe)
We were rather unorganised when we gathered the poppy seeds, and they all ended up in one big jar.
Let me know if any of this is of interest. :)