Don´t buy, you will not compile license control dcu in newest Delphi, I have source code but only works on D11.3.
Recreate license control from scratch is the only solution if CG can´t help us, I will prepare a virtual machine with remote access to work together to develop this source in community. I'm working on it, now it's working on runtime, but these code require more work for development environment.
My email is
omarperezh@gmail.com if somebody can help with this work too