I need it integrated with a template, with all the buttons etc.A few more details would be good.
The entire point is that WHMCS is messy and playing with html/css takes time. It's usually easier/simpler to pay the $20 or w/e and get the integration done instead of spending hours on it.Why pay someone! I made my own theme
Knowing a bit of HTML and CSS, you could figure out how to do it. It might have bugs sometimes, but Google is your best friend.
If you aren't so pro, try WHMCSIntegrate. They have some nice reviews.