I e-mailed Pro-Clip to see if they have a clip (Holder)for the new 8700 Series.
I also suggested that they move the "hook" for the charger cord to the left side to match the Blackberry USB (Charger) jack.
I received a nice e-mail from their Customer Service advising that they would e-mail me when the new clip was ready. She also stated that she would pass my suggestion along to their engineers.
If you are interested, you may want to send an e-mail along to them as well, to create some "demand" for the new product.
Their website is: www.proclipusa.com
Also, I just tried the 8700 in the 7290 clip. The fit is verry "sloppy" and it will probably fall out. I may be able to pad it a bit with the loop side of some velcro until the new clip is out.
I will post if I hear anything more from these folks.