[HeadphoneAddict]

Quote:

Does anyone know where to get a pair of those plastic retainer-rings?

 I bought a set from PartsStore.com in 2009
 
[size=17pt]Order Details[/size]

[size=9pt] Denon[/size]	[size=9pt] 9H30001707[/size]	[size=9pt] POM PLATE 2P SET ADH2000/5000[/size]	[size=9pt] $4.95[/size]	[size=9pt] Pending Sourcing[/size]	[size=9pt] 2​ [/size]	[size=9pt] $9.90​ [/size]

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http://www.partstore.com/Part/Denon+Electronics/Denon/9H30001707/New.aspx
They are out of stock right now but the web site says they can special order them.