what attachment for clearing brush alongside?

[dukenyc]

I have a JD 4100 (20hp, 17 at the pto) with a belly mower which works fine for maintaining some paths around my property. What is happening is brush and small sapplings are leaning over and encroaching on the paths.

Is there a side mounted cutter or saw that would handle this sort of task? It can all be cut with a shrub cutter, but I would like to get something tractor mounted if possible.

Thanks.