Hi Suga. Most drawers have a knock-out drawer but you should be able to simply remove the knock-out bar and use it as a regular drawer without any issues.
You could try Coffee Craft in Glandore. They may not have them in stock but Im sure could order one in. Otherwise try sending an email to the sponsors on the left, either individually or all at once using the SiteSponsors@coffeesnobs.com.au address.
What coffee machine do you have? Do you want the grinder to site on top of the drawers too? Youre probably looking at around $200 for a new one. They come up every so often on evil bay too. I doubt you could get one made for that price.