If you live in the USA,get mixed tocopherols from http://www.Puritan
Pride.1000IU vitamin E
150 capsules for $17.82 product#0551.1-800-645-1030.You can use 4 capsules to make the enema.If the vitamin E you are using states 100% pure and it is a mixed tocopherol containing d-alpha plus d-beta,d-gamma and d-delta,it should be OK.
Be sure the enema does not contain more than 1.5 tablespoons of water.Don't worry if the enema can only be held a short time.It will still be effective.
Just on the very small chance there is a food allergy or intolerance to soy made vitamin E,you can get the vitamin E made from rice bran from http://www.wonderlabs.com