it depends... If you want the spring roll wrappers as you get in the takeaway, you can either make them yourself (really not worth the bother, if you ask me, or you can get them ready made, frozen in the Chinese supermarket. I doubt that any mail order company would be able to send them to you (unless you find it in Ocado, or Sainsburys, who deliver temperature-controlled shopping).
The alternative, is to get the Thai/Vietnamese spring roll wrappers, which are sometimes also called 'rice paper', which CAN be sent via mail. Looks like this:
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or this:
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