Can anybody tell me where I can buy some isotope labeled polyols?

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No title

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Wolfram Meier-Augenstein

You could try Cambridge Isotope Laboratories (CIL) though I suspect any of these compounds will have to be custom-sunthesized.

http://www.isotope.com/

Sascha Nehr

You could also try: http://www.polymersource.com/

Polyols are sugar alcohols. Threitol and erithrytol are diastereomeric sugar alcohols with a C4 backbone, chemical formula C4H10O4. Polymers such as polystyrene or PEG are chemically quite different from polyols (= a compound with many OH groups).