Re: MAB Brevete Model D (made in france)
army vet, I am afraid the chrome plating destroys most of its value as a collectible. Collectors generally do not want refinished guns unless they are very rare, and the MAB D does not qualify on that score. That means its value depends on finding someone who wants a 70 year old, medium sized pistol in 32 Automatic as a shooter or as a re-refinishing project, which can be tough to do.
You should be able to find replacement grips easily. A lot of MAB D's came into the US in the 80's and 90's when French police departments surplussed them out, so parts and magazines are all over the place - like Ebay, for starters.