This morning the latch that holds the clip on broke. A call to Whistler advised parts are not available at this time. However I found that the same Motorola belt clip that I used as a replacement on my Psr500 also works for the 800! The part # is NTN82668. I used a cut off disk in my Dremel to cut 12mm off of the end of the retainer spring in the clip, then bent the remaining portion of the spring out slightly so it would grip the ledge on the back of the radio. Be aware that it will be very difficult to remove the clip from the radio since there will be no tab to pull back the spring. On the 500 I ran a 4/40 x 1/4 screw out the back of the radio with a nut on it and let the hole in the end of the spring go over the screw to hold it in place, but the clip fits too close to the top of the radio to use this method on the 800. Since the spring is wider than the ledge on the radio I think a small knife blade may be used to release it if I ever have to, but it have never wanted to remove the clip from either radio.
Ron
Ron