I have an alloy set I purchased on eBay for about £20 posted - not an original Shimano part but they do the job.
I had a quick look on eBay and these NOS ones are available for £17.59 - I believe the are original Shimano ones. http://www.ebay.co.uk/itm/bike-dynadrive-shimano-Dura-Ace-Adamas-600-AX-pedal-crank-adapters-/191691493965?hash=item2ca1b4124d:g:do8AAOSwyvBV9-bp
The seller is 'on here' (I forgot his username) so I am sure he will do you a good deal off eBay.
Cheers
Vince
@Vince started
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I have an alloy set I purchased on eBay for about £20 posted - not an original Shimano part but they do the job.
I had a quick look on eBay and these NOS ones are available for £17.59 - I believe the are original Shimano ones.
http://www.ebay.co.uk/itm/bike-dynadrive-shimano-Dura-Ace-Adamas-600-AX-pedal-crank-adapters-/191691493965?hash=item2ca1b4124d:g:do8AAOSwyvBV9-bp
The seller is 'on here' (I forgot his username) so I am sure he will do you a good deal off eBay.
Cheers
Vince