Basically all the 105 Coupe doors are interchangeable so far as fitting goes, but there are some cosmetic and functional changes in the doorjambs and window regulators.
In any case, there is no such thing as a 1969 2L, so presumably you mean 1750? It would have a scissor type window mechanism
not cable like post '71 cars. However, the door would still fit.
Which side are you after and what condition is the door you are replacing?....I have some post '71 cable type. A bit rough but fixable.
Cheers,
Vin