You can buy various gubbins that allow you to fit rear racks via a combination of QR skewer and clips. Tubus do a kit for their racks.
Another option would be one of the smaller Carradice bags with support. It really depends if by 'touring' you mean 'touring with a tent'.
@Vanneau started
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You can buy various gubbins that allow you to fit rear racks via a combination of QR skewer and clips. Tubus do a kit for their racks.
Another option would be one of the smaller Carradice bags with support. It really depends if by 'touring' you mean 'touring with a tent'.