There are many whmcs themes in this also . you may try any.
Lagom 2.1.1 - WHMCS Theme (latest version)
https://www.nulledfrm.com/threads/lagom-2-1-1-whmcs-theme-latest-version.69950/page-2#post-624804
is this nulled and working fine? is this nulled and working fine?is this nulled and working fine?is this nulled and working fine?is this nulled and working fine?is this nulled and working fine?