your honestly better of probably just buying a
dna 40 mod box i think about the cost
dna 40 - $60? with shipping + shiping your mod to however offers $20? + 1-3h of someones time $??? looks it would be probably all up over $100 and there are plenty of good TC boxers at a similar price!!
I would recommend just giving the mod a go your self its easy just desolder all the wire from the DNA 30 and solder them into the DNA 40..... or just buy a new box mod