For sale is a JOBO 3063 drum in good condition - this one can be used for 20x24" prints (or negs...).
Comes with several clips (see one of the attached images).

Price: 150 EUR (or $200).

Payment by bank transfer (EU) preferred. Shipping from Croatia would be something like $40 to USA, less for EU. Will check the actual shipping cost according to buyer's location.

If needed, I could make a custom PVC film insert for negatives, for the format you require, to fit in this drum, at additional cost = something like THIS, (ANOTHER picture), only for larger formats - the two images in the links show one of my inserts for 5x7 negatives.