How to fix things onto the Habitation Door

I have just knocked the Brabantia bin off the Habitation door on my 2010 Broadway again! The bins is held in place by a plastic frame which is held by three screws onto the habitation door. Unfortunately the material of the inside of the door is thin plastic covering some sort of compressed polystyrene, so the screws don't hold fast if the bin gets a bit of rough treatment.  My bin has already been re-fitted in slightly different locations two or three times. Has anyone solved this problem? What sort of fixings did you use? What would you recommend?

How about auto double sided tape, it is strong holds no. plates as well as other auto exterior items..

Suggest you drill slightly larger diameter holes at the originals and fill with adhesive then push in plastic wall plugs and allow to set for 24 hours. Larger screws are then used to accommodate plugs. We found this method successful when fixing an otherwise loosened towel holder on the bathroom door which as you know is simply filled with cardboard.

Industrial strength Velcro.  We fixed a first aid kit to a bulkhead in our last van. The only time we needed to remove it, in an emergency, we couldn’t budge it.

I can also vouch for the industrial Velcro.

Velcro is good but I used some small plastic wall plugs

Thanks for all your suggestions. The velcro and double sided tape idea doesn't work because the frame has a very narrow profile without any big areas flush with the door. But I will try the wall plugs, glue etc.

Its looks like you have a nice flat surface to mount on.
You could try fixing a back board to the frame (either kitchen cutting board or 3mm MDF sprayed Black to match, this would then give you a large surface area to stick or velco to door panel

Gorilla double sided WATERPROOF tape, once stuck it won't come off (highlighted waterproof as they do two types and this ones the daddy.
Pete

Final solution, dump the bin

You could try a recessed m6 screw in nut, from screwfix and then use a bolt to attach it to the door

Take your pick. 

http://www.ebay.co.uk/bhp/cavity-wall-fixings

The trim is thin and VERY difficult to remove with both trim clips and double sided tape. You haven't much space behind it and you don't want to drop anything in the gap. I could remove my bin and photo the little plastic plug that did the job, but we are going away in the van for the weekend so I don't think that's a good idea at the moment.

Thank you all for your suggestions and especially Heanorboy who suggested the way forward. I found a bit of plywood in the garage, screwed the frame onto that and stuck the whole lot on the door with stick-on velcro. I'll let you know if it works in the months ahead. 

sounds good.