Add-ons for French carriers.

[gfax]

Good morning,

In France we have carriers like “La Poste” (French post office) and Mondial Relay (parcel drop-off relay).
For OsCommerce 2.3.1 there are add-ons for the French post office with Colissimo for example and an add-on for Mondial Relay.
For version 4 of OsCommerce, how to integrate these modules to continue to offer these services? There is no version of these modules for version 4?
If not, it is very difficult to leave version 2.3.1 (in my case) for version 4 and offer less service than before...

THANKS.

Sincerely.

Philip.