Peterbilt Clutch Issue Eaton

Hi members,
I currently have a Peterbilt 389 with a self-adjusting clutch and now I'm getting to the age where pressing the clutch down gets too hard on the knees, does anyone how we make the clutch easier to press down? Peterbilt is old-school in that they have no hydraulic or air assist. I have eaton on self-adjusting clutch 15.5 2050 part 309-701-35, is there anyone we can add an air-aid or hydraulic assist in it to make it easier to press? Like W900 now are on air clutch you can press down with your hand easily. The Peterbilt clutch makes you use all your leg power. If there are any solutions please let me know. other than lubrication because I do that consistently. Thanks
If you guys know anyone willing to add a hydraulic assist or air assist to it please let me know.