Here's one that has a 6mm stent for a relatively bearable price:
https://medicalmaterials.com/all-products/lifestream-balloon-expandable-vascular-covered-stent-5-7mm-x-37mm-x-80cm/
James gasped as he was hoisted effortlessly up onto the changing table. He winced as his sore bottom connected with the plasticky cushion.
it was a strange feeling, being so helpless, so out of control. But something about it was… alluring.. arousing.
But he blushed profusely when he saw the thick pink diaper. It was so infantile! And why was it pink?!
Still, the soft scent of powder, and Hannah’s sweet, encouraging, motherly tone made James simply obey. He ogled her tits greedily as he murmured.
”D… diapie… please”