Unfortunately it looks like you would have to build from source. The best place for that would be Rich Webster's fork - https://github.com/rdwebster/Open-Quark - which is the version maintained by Indicee.
I imagine the documentation is completely out of date.
Anyway, if you don't want to look at it, that's your loss - while I don't think CAL has much of a future a lot of work was invested in it by a very talented team and there is probably something to be learned from it.
I am not going to install this, even if I would find it somewhere, hence ....