NHT HDP-1's

Does anyone have any personal experience with them? I just picked up a pair used for $20+shipping. I think that is a good deal because I just saw a pair on ebay go for $87.
http://cgi.ebay.com/ws/eBayISAPI.dll...sPageName=WDVW

Here are what they look like:
http://i12.ebayimg.com/02/i/03/be/d9/a6_1_b.JPGhttp://i12.ebayimg.com/02/i/03/b9/ba/b3_1_b.JPG
http://i20.ebayimg.com/02/i/03/b9/cf/19_1_b.JPGhttp://i3.ebayimg.com/03/i/03/b9/af/c3_1_b.JPG
*the ones I purchased do not have dented dust caps!!

Anyone know of a good source of replacement NHT drivers? I sent an email/request to their tech area on their site, but anyone know of anywhere else?

I need a replacement 3-3.5" cone mid/tweeter. One of them has the voice coil binding with the magnet. I am thinking of going with a driver on partsexpress' web site, but I would rather just get one replacement NHT driver of the exact type, instead of 4 similar drivers, replacing all of them, and hoping it works ok.