Sonicflood,
Sorry about the delay in getting back to you. I heard about them from a sales/installer guy at Sound Stage (I'll never buy from there again). The ends cost $5 each. I'm sure your local high-end A/V dealer can get them for you if they carry Monster Cable. You'll have to have your dealer put them on or special order them from Monster Cable through your dealer for they require a special tool to put on. I was told by the guy at Sound Stage that the tool cost $300. Then again this guy was an idiot and I will never shop there again (they have no idea what they are doing). I contacted Monster Cable and am getting a pair made for me by them as I type this. There very good ends when put on right. SOme other good compression ends, if your interested are Liberty and Canare. Liberty has a web site (I think it's just liberty.com but I'm sure a google search will find it). Liberty compression ends sell for $3 at one of the local high-end A/V dealers in my area. However, if you want to put them on yourself, I think the compression tool costs aroound $150. Hope this helps.
Best Regards,
Kenshin