Brassard uses urethral tissue for inner labia/clitoral hooding as well.
The other thing to keep in mind is that very few surgeons do the "pure" penile inversion anymore; because the glans is removed and [partially] repurposed into the clitoris, even the supposed PI surgeons tend to take a bit of skin graft/scrotal skin and supplement at the end of the penile tube with it. Basically, that end is open and needs to be closed anyway, and it's relatively little extra work to add more skin there = more depth if need be.
Which surgeon is "best" depends in part on your personal priorities - I wanted function and aesthetics over depth, for example, and ruled out Meltzer just b/c of price. All of the top surgeons will generally do a stellar job, but most do have their quirks/specialties.