Imran,
You asked about custom knife experience. About a year ago I needed to make a specific profile to match a frame and panel desktop I was repairing and had a great experience with Charles GG Schmidt & Co in Montvale, NJ, . I sent them a slice of the wood part I needed to reproduce, along with measurements and some notes, see attached photo. They sent back a dimensioned drawing for approval and for $142 + shipping I received a pair of 40 mm cutters that fit the Felder head and worked perfectly. It did not include limiters but I ground down a similar pair and used them though not sure that was totally necessary.
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- Dave Rossetti, Santa Fe