I recently purchased some Gold and Silver on uphold.com
I'm thinking it's a nice addition to my Bitcoins Solarcoins and Litecoins.
Support was pleasantly interested when I messaged them about the addition of a Solarcoin card. They are definitely thinking about adding new currencies that go well with their concept. I think Solarcoin fits right in!
You can sign up using my referral link to get 5$ for free if you don't have an account yet
https://uphold.com/signup?utm_campaign=refprog&utm_medium=slarquieOnce you have signed up you can switch between a list of different currencies mostly for free.
Don't forget to message them to add a SLR card. Maybe a few more requests is all they need to start really thinking about it!
(you have to verify to get the 5$ for free..it takes less than 5 minutes).