I have emails for seeds form the following (from september last year to-today):
randal24
robskinner
Jadds
edgedemon
mattd938
paulStat
jack.mitchell
kinobestew123
I'll send you all an email to ask if you're still interested
and then I'll get them out to you this week. According to the weather charts this coming week is quite mild so they're not going to freeze in the mail.
Overwintering - you may still need to water them a little. I've not watered mine since cutting them back until today when I noticed the small leaves that have remained were wilting a little so I gave them a mug of water each and the leaves have perked up again.
If the plant is green then it's alive still, if bits are brown then they're dead bits (it may still be alive if the stem still has green bits).
edit: email sent to those above - some have already give me your snail mail but others will need to before Tuesday. I'll then post them Wednesday.