Is there a ftp proxy irule smiliar to the HTTP_Proxy_v3.2 irule ?

We have used the HTTP_Proxy_v3.2 irule for several years and it works great. Is there anything similar for ftp ?

We would like to allow outbound ftp proxy access from secured private IP space on campus to necessary ftp sites.

i realize that it is not secure and not a good idea but needed anyway.

Thanks,

Tom