m.a.s. lens case pro 200

I bought this for my Nikon 75-300mm f/4.5-5.6 AF Zoom. It fits with so much room to spare that I have to wrap the lens in bubblewrap before putting it inside the case. All the fittings on the case seem pretty tough.

Does what you want.

I bought this for my Nikon 70-300 which is also fitted with extension tubes. Works a treat with room to spare. Just unclasp the strap, fit it into the loop on your case, reattach the velcro and studs and your away.