Where can I buy a single (1) custom card stock postcard?

I am aware of PLENTY of websites that allow you to buy custom postcards using your image in quantities of 25+. What I'm asking is, is there ANY service that provides quality, card stock postcards individually? I literally want to make one, not 100, as I am not doing this for business reasons (more a personal letter to my friend).

PLEASE DO NOT SUGGEST WEBSITES WITH A MINIMUM ORDER OF OVER ONE (>1) POSTCARD.

Thanks!

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