It is likely that at least part of the reason some of your competitors rank more highly in the search engine rankings is that they have higher link popularity - a greater number of relevant, quality link partners.

So, find out the web sites that are linking to your top ranking competition - for only £20

You know they are relevant to your area of business, you know they accept links, you know they are boosting your competition through link partnerships.....why shouldn't your competitor's link partners help boost your web site too?!