Can I get a quick release head for a Vivitar 900 tripod?

The quick release is actually built into the tripod head, so you may need to replace the entire head. If it has standard 1/4" thread, this should be quite simple.

Try a plate from another tripod. I have three different tripods, and the quick-release plates are all interchangeable.

That can be found here: http://www.tripodquickrelease.com/Vivitar_Quick_Releases.htm
Check model numbers carefully

Try this site for more info and sizes of quick releases: http://www.tripodquickrelease.com/Generic_Tripods.htm

Take a look at www.tripodquickrelease.com or give us a call at (864)583-6835, we might be able to fix you up with a quick release. Ambico quick releases are generally hard to find, but we've found a few that will fit.

Try www.TripodQuickRelease.com for that part. There is listed the widest selection of quick releases and support more brands than any other web site I've seen. Because your tripod is not supported by the manufacturer; parts lists and pars are not available, you should measure the opening and see what other brand quick releases will work paying attention to the shape and locking mechanism. Otherwise just get another tripod.

Try www.TripodQuickRelease.com for that part. There is listed the widest selection of quick releases and support more brands than any other web site I’ve seen.

Camera mounts are pretty much the same. Any good camera shop should have what you're looking for.

That model is listed at www.tripodquickrelease.com That exact model seems to have three listed on the site for $ 16.99

i lost the same part and i don't know what to do :(