Hello!!---I can do it for sure---I am WHMCS expert having 7 years of job experience in-
whmcs server modules development, WHMCS and WHMCS addons-modules development, whmcs theme customization , Whmcs payment gateway modules, whmcs re-seller modules development, whmcs domain registrar, Whmcs + iphone app development
Looking forward to your available revert.
Thanks!!