Well today i've found some virtually conclusive proof of the BX10.
Its a reasonably well known fact that the BX11 both in mk1 and mk2 form was available. This was available in Switzerland, Portugal, Italy and Greece amongst others. There was even a special edition BX11 called the Atout of which Tim2cv off this very forum took a picture whilst in Greece.

Getting back to the BX10 then.... Officially it was called the BX Dommage. It was ONLY available in holland in 1985 and approx 250 were made with the 954cc engine that soon after appeared in the AX10. A whole 42bhp was available to all those speed freaks out there
It was marketed as a town car only with the ability of going further afield if required to.
This was a seriously spec'd down mk1 car. No fuel gauge (just a warning lamp), trip meter, rear wash/wipe or heated rear window.
It didnt have interior carpets, just rubber mats, much the same as a 2cv really.
The seats were covered in a waterproof (wipe clean) plastic and had no headrests.
As with our 62hp early BX it had a metal bonnet and bootlid (perhaps these were cheaper to make at the time?)
The fuel filler cap was a screw on device without a flap.
One of the distinguising features was single piece windows in the rear door i.e no rear quarter light and they were fixed in place.
Also there was no 'mini' spoiler on the bootlid, i believe this was the ONLY model without one.
They were only available in red or blue and had 'Dommage' badges on the front doors and bootlid. It also came with a picnic basket with Dommage written on it.
They were damn cheap though, significantly cheaper than the BX Basis that had just been launched in Holland.
Of the 250 produced it is thought that just 17 were sold! Presumably because they were significantly underpowered? Apparently the remaining Dommage's were re-engined with the 1360cc unit and sold as the BX 'Basis' which was Holland base model BX at that time.
I need somebody much sadder than me to help me piece together this story with as much accuracy as possible. The small sales numbers certainly would account for why there are so few pictures available.