I bought a paper Edition of the CS workshop blue manual via eBay in the US, one left. It is a reprint, so probably always available.
BMW 3.0CS 3.0CSi 3.0CSL 3.0Si Repair Manual 1971 1972 1973 1974 1975 1976 Shop
If you are interested, here is the link
http://www.ebay.co.uk/itm/400585221949?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
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BMW 3.0CS 3.0CSi 3.0CSL 3.0Si Repair Manual 1971 1972 1973 1974 1975 1976 Shop
If you are interested, here is the link
http://www.ebay.co.uk/itm/400585221949?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
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