Not quite sure what it is you are looking for. If it's just a pair of DC10-40s then they appear second hand from time to time.
www.thehangar.co.uk is worth looking at for that.
If you've already got a broken pair that needs fixing, then a friend of mine had his DC10-40s fixed by Headset Services at Shoreham Airport - might be worth giving them a try. Cannot post the link (BRL will kill me), but their website name is quite obvious, and in the .co.uk domain...
