Whois Script with a twist

Hi, Can anyone point me in the right direction for a whois script that does the following. 1) Searches all the main TLD's....including .uk etc 2) If a domain has already been brought, then it displays details of who owns it. 3) If domain is still available it displays message "click here to purchase". etc which goes off to a purchase screen, where i can echo out domain name into a form. All whois scripts Do 1) and 2) but I can't for the life of me find one that does 3). I attempted for over a week to write my own, but I have not got quite enough skills yet to perform such a function. Thanks in advance. Martin martin@vispa.net