Tonilynn - I think the best shortbent skew chisels are made by Pfeil (I have no financial interest here). In fact, the ones I'd recommend are actually their flattest gouges, skewed, rather than actual chisels. Pfeil cut 2 is their flattest gouge; they make a right and left skewed version and you'd want to buy a pair, 3mm is a good width. Their shortbent (spoon) cut 2 gouges at various widths are also very good for flattening backgrounds too. As for sources, you'll need to do a online search I'm afraid. Hope this helps!
