Check out these lovely, nostalgic and fun embroideries by Dash of Magic {via I Adore Style}:
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Also, these AshiDashi Notebook and Pencil socks {via swissmiss}:
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Some further searching found that the Desing Museum Shop carries tea towels designed to look like lined paper:
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Also, more handmade goodies:
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woven on a tapestry loom by carson elaine
This is an example of lined paper as, um, lined paper by Think Experimental, but I like it:
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{via wrong distance}
You can also find lined paper substituted for napkins, toilette paper, place mats and sugar packs in this ad campaign (but they aren't actual products, though maybe they should be).
I could see it used as a theme for rugs, bedding and clothing.... Have you seen it?