Sourcing small advertising agencies

I'm looking for small advertising/marketing agencies to purchase and roll up. (under $1M revenue). I have had some success in the past acquiring similar companies in the web design space and looking to stay in my 'lane' in the agency services sector where I feel pretty comfortable identifying issues in diligence.

I've had some luck with direct mail letters in the past but hoping someone in the Searchfunder community might pass over something like this and remember the guy named Link in New Hampshire! I'm also happy to be a resource to anyone looking to buy in this space and has questions.

Finally, please reach out if you are an investor interested in the agency space and/or would like to partner of a larger firm. I've been mostly acquiring using my own limited capital and seller financing which works but it's slow going.