Bought a Crumpler Jimmy Bo 400 on ebay. I already had a bag for all my gear and was looking for a easy to carry one lens setup for when I'm on the go. It can be used as a shoulder bag, but also has the ability to be used as a waist bag with leg stabilizer band.

I intend to use it for my Nikon D7000 with the kit 18-105 lens on and looking at the size of the pouch, I might try to squeeze in my SB-700 or my 35mm f1.8 if I can.

Haven't got it yet, but it seems good and might work for you.

you can fit a quick release plate to a Spider, you can also fit the eye bolt for a black rapid
you can even fit Both

Thanks for suggestion. I will have a quick release plate on so looking for a more conventional holster. Just looking for right size for these bodies with the small lenses attached.

I use a Spider Holster, it keeps the camera out of the way to the extent you can forget it, a small camera could be hidden under your jacket. I also use Think Tank lens changers on the same belt, these allow you to quickly change lenses, but are a bit bulky and conspicuous

Making trip to France with the family. I have a big backpack to haul gear from hotel to hotel but want to just carry the 2 bodies in holsters and maybe a couple extra lenses in a book bag when I go out. I will have compact lenses on the bodies most of the time: 105/2.5 and 35/1.8.