Suporn does penile inversion and adds a few of his preferred features. e.g. He meshess the scrotal skin for the vagina. Basically, all surgeons perform penile inversion in Thailand with their own twist of style learned from hundreds of procedures and then give it a marketing name. For example PAI has 2 srs surgeons, Dr Sutin and Dr Burin, they both have a different style. One observation is that Burin has stitches at the top of the labia majora, which kinda makes sense now as so many complain that the labia majora is too wide. This individual style results in the same surgeon required to correct or later aesthetic procedures.
Other than Sigmoid Colon, there is no other modern way. Its all about skin availibility and sensitivity for orgasms.
For the real aesthetic look, you need to have a secondary surgery a year later when dilating is not necessary daily. Mostly to narrow the labia majora, extend the labia minora to the vagina entrance and touchup on the clitoris and hood. Suporn patients and all the other surgeons have this secondary procedure which costs usd 4 to 5 thousand extra.