Is this what you are looking for? ………
https://www.leboncoin.fr/equipement_auto/1568458785.htm/
‘fraid the price is a lot steeper than the one spotted by JG – but I suppose it is better than having an undriveable £12k investment.
In the meantime, you could always go in through the rear seat and loop a rope through the mechanism to hold it shut temporarily.
B…………………
Bernie