Peavey RSB replacement neck (24 frets, neck to thin for me)

I am the proud owner of a Peavey USA Rudy Sarzo Bass (RSB). Its a great bass, it has VFL pick-ups and Koa body. When I bought it I didn't think the slim (very slim) neck would bother me but it's too small for my hands and it becomes uncomfortable on gigs.

The neck is 24 frets with no fretbaord overhand (extension). This makes finding a replacement neck tough. I like the bass and I'd like to keep it but just find a thicker neck - is this possible?
 

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I am the proud owner of a Peavey USA Rudy Sarzo Bass (RSB). Its a great bass, it has VFL pick-ups and Koa body. When I bought it I didn't think the slim (very slim) neck would bother me but it's too small for my hands and it becomes uncomfortable on gigs.

The neck is 24 frets with no fretbaord overhand (extension). This makes finding a replacement neck tough. I like the bass and I'd like to keep it but just find a thicker neck - is this possible?

If you want to sell it let me know. I’m looking for one