ANR upgrade options for David Clark headsets

[Mr Proachpoint]

Anyone know of cost effective 'aftermarket' ANR systems that can be fitted to a standard DC series headset. The more I fly, the more I wish I'd coughed up the extra few hundred notes to buy ANR in the first place...........

MAPt

[Mark 1]

I used the Headsets inc. conversion on my H10-20 (similar to 13.4), which has worked very well.

Adam's at Biggin Hill do a similar unit.

I also have an H20-10 which is convertable, but it needs to be done at the factory rather than DIY.