Hi, I'm new here, so apologies if I'm posting in the wrong place.

I think you are going to have to rely on word of mouth and any contacts you might have. You aren't going to be looking for a very big area - so it might be worth just driving around and keeping your eyes peeled for a bit that looks a bit unused, because perhaps it is too small to be of much commercial use. If you can then ask around and find the owner, you might be able to strike a deal.

You might try an estate agent who sells properties with 2 to 10 acreas. One of his 'clients' may be glad of a grass cutter.

In Shropshire there is a "flying flock" scheme where you can register if you have grazing land available, or need grazing land, don't know if this exists in other counties.