I can add it, but seems a bit wasteful when the actual developer says you should use something else (like airware).
Have you tried the latest carla yet?
(packaged as carla-git)
It can load win32/64 plugins as well.
Yes, I use Carla-git a lot as a standalone guitar rack, and it works very well, however in Ardour I would prefer having single plugin in chain directy instead having carla plugin hosting the actual plugin, it just works better for me, besides I`ve noticed Carla uses a lot DSP for win-vsts, for example BootEQmkII in Carla (both standalone and lv2) ~35% DSP load, while te same plugin in Reaper under wine about 7% DSP load.
I`d try airwave as well, but compiling is a hell for me:)