I looked through several tripod catalogs and found nothing like you want.
But I did find a number of flash Brackets that might work.
They attach between the camera and the pan head.
I suggest you go to www.porters.com and have them send you one of their 120 page catalogs.
I also suggest you visit a local camera store and see what they can come up with.
Not a department store camera department, but a camera store that only sells cameras.
I want to be able to connect a few items, Camera, A Yoke, and a Light to a Slidebar on my tripod. Does anybody know of any attachments that will allow me to control all with a single pan head? They all have to move simutaeously, so I only need one pan head. Any help would be highly appreciated.