Immediate Page Fix & WordPress Migration

I have one page on our current site that must be changed right away (remove some people from management page)—the site with built with a plug in called "KC Composet". That plug in no longer works and I can't update without it... (Budget: $1500 - $3000 AUD, Jobs: CSS, HTML, PHP, Web Design, Web Development, Website Design, Website Development, Website Management, WordPress)