have you considered just putting an extra prefold (folded long ways) in the middle of the diaper? That's what we do and it works fine.
This makes it bulky but as long as the snappi fits and LO's bum still fits in the jammies it does the job. I'd top it with a stay dry fleece liner (cut up an old blanket- no sewing required). Or consider using a wool soaker and converting one from a sweater.
You can also try to made a knit cover,there is a webside that you can check at it they have differents option and free paterns to try.just go to tipnut.com and check the crafty onesies,homemade diapers and assorted tutorials.
Re: Cloth Diapering on a budget!
If you're craft you can sew some out of old sweatshirt sleeves. Just an idea.
This makes it bulky but as long as the snappi fits and LO's bum still fits in the jammies it does the job. I'd top it with a stay dry fleece liner (cut up an old blanket- no sewing required). Or consider using a wool soaker and converting one from a sweater.