Concerning custom turnouts, Brad strong of Signature switches makes just about anything in any gauge. His workmanship is excellent, he will make any variances you want or need. His prices are reasonable. You can even crayon a template to converge any arrangement of tracks in any gauge, any code.
When I was building layouts his special switches made the impossible workable.
Diamond on two curves.
He even makes curved and straight ladder tracks with the points butting up right next to the frog.