Fretboard Extension

[Donald Cajonn]

Just bought a MTD kingston artist bass. Was thinking about adding a block near the neck for added comfort when slapping and double thumbing. which then led me to a finger board extension, Does anyone make a fretboard extension that will add a few frets making it a 30 fret bass for example?

 

[Rocky McD]

I have only seen 22 & 24. I'm quite sure no one makes a 30. Many players have ramps to level out the space between the fretboard and pickups. They are contoured to match the pickup shape, not the fretboard.
Rocky