Anti roll bar bushes.
I know you can get the ordinary 4L saloon bushes from Portugal ( visit French ebay - "Renault 4L" in 'Auto: Pieces/Accessories' ), but I haven't seen any F4/F6 bushes. The anti roll bar on the vans is a larger diameter. It would not be impossible to drill an ordinary one out and then have a new sleeve pressed in. The ones on my F4 were a little perished on the outer surfaces, but should be OK. I have an F6 in Spain, and the local garage managed to somehow incorrectly re-assemble the outer bush mountings after replacing my front suspension bushes etc, with the result that the bar not only mangled them up, but actually escaped from one end. The bar now gives a clunk to the floor now and then, so I would be happy if you find a supplier, as I could do with renewing them. Cheers Tim