How to query posts by month based on date custom field?

Question

I currently created a custom field for a custom post type that stores a date in the format dd/mm/yyyy is there a way to query the posts by the month?

I "kind of" got the functionality I need using the following query:

query_posts('post_type=attraction&meta_key=attraction_date&meta_value=10&meta_compare=LIKE');

The meta_value parameter would be the month but since I'm using LIKE to compare if I have a date like 10/04/2011 it'd be returned even though it's not from october.

I know there's a RLIKE expression in MySQL that lets you use regex for the LIKE condition but I'm not sure if wordpress lets you use it in any way.

Thanks in advance!