To give a wider choice of sounds and more control over the way the sound evolves as the vibraphone is hit harder or repeatedly or with different mallets, perhaps give Moddart’s Pianoteq modeled vibraphone software a checkout…

https://www.modartt.com/vibes

Samples don’t quite get it right, as the crossover points usually jump out unless there’s a bunch of layers.

You might also try a technique where you split the keyboard, but have the vibes on both sides with the lower half transposed up into the same range as the right hand. You can now do some RH/LH things that are the essence of vibes playing without your fingers tripping over each other.