RPMs of autotoolized version (by Koji ARAI) of LHa for UNIX (by Tsugio OKAMOTO)
The latest version is not created/released yet.
The latest source code including lha.spec.in is provided at rpmspec branch of GitHub yoheie/lha.
Old versions are unsupported and vulnerable. Use the latest source code on GitHub repository.
You can download old versions here.