Thank you Johan 
I have now done some Wikipedia-ing, and it seems there was indeed a regiment of R35's in Syria that fought for Vichy, and another in Morocco, although that didn't see action until Operation Torch in 1942.
There were a few of the H39 tanks sent to 'the colonies' although their disposition doesn't seem quite so certain.
However, it seems as though I would have reasonable grounds to include one or two of each type in a small Vichy force to add to my WW2 North Africa collection... 
There were 95 Renault R35s in the French Levant (now Syria), which saw action against the Commonwealth forces (mostly Australians) in 1941.
There were also 45 H35s and R35s stationed in Morocco as part of 1er Regiment de Chasseurs d'Afrique. These saw action against the US Army following Torch, along with Char D2s and Somua S35s in other units. The French forces then switched sides, but seem to have continued to use D1s and S35s. When these units switched to M4A2s, they kept the Somua plaques and fixed them to their Shermans.
Vichy tanks were usually painted and marked in the usual French fashion. S35s had a sand overspray and oversized French national flags. The R35s in the Levant seem to have been quite plain, judging from the few photos I've found.
