Exhaust leak at the EGR cooler bellows

[DonP]

I have a Cummins ISX 871 engine in my International ProStar. I recently have developed an exhaust leak at the EGR cooler on the bellows. You can reach behind the bellows and feel a small hole. I went to Cummins only to learn that you cannot replace the Bellows but you have to replace the entire EGR cooler. I have 640000 miles on my truck. Is this something that happens or is common to that bellows? I have done in EGR Delete on my truck and my truck runs very well and I have never seen a hole in the bellows before so I would appreciate some Direction some ideas thank you in advance