The old Jungle Warfare CDs are good for that, plus Jungle Frenzy. They are by Zero-G. I bought them all in a bundle a while ago, they have every single classic break on there along with loads of others.
We have remastered 97 oldskool jungle loops for free download. You can download from our SAMPLE SHOP. These samples are being used in a lot of the new future jungle released into the dnb charts. The download went quite viral and had a few thousand downloads in the first week. Below is the classic amen brothers amen break re-mastered.