Drupal developer wanted for Block visibility module

Module is ready
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We're looking for a Drupal developer who can build us a simple module that provides an admin page that contains a simple checkbox that will make a specified block(s) be visible on the site or not.

Example:
BlockID's = 27, 31 (It should be possible to change the ID's inside the module code, there's no need to include it inside the administration page)

When an admin turns of the checkbox on the administration page, the block(s) will not be visible anymore on the site.
When he turns it back on, the block(s) should be visible again.

So what we need is a simple module that provides us a administration page with this checkbox and the the possibility to set the permission for this page to a role on the permissions page.

Drupal core: v6