You can find a list of ICAN accredited registrars from here:
InterNIC Registrar Listing
You can visit the various registrar websites and find one that suits your budget.

It is unlikely you will find a third-party company who offers the same or lower prices than what you can get directly from certain registrars. You must remember that these companies need to make some profit as well. That is why you normally see prices probably in the range of eg RM35 - 55 or so. After all they are providing a service for you and you need to pay for that and they need to cover overheads etc.