I did find a Peg Perego pram that is a tandem pram and accomodates a capsule but not sure on the $$. Aparently its only available in Melbourne. Its called Duette SW (19kg)or Tender CSR (13kg) with the Primo Viaggio Car Capsule.
I'm assuming it is $$ as most of the other Peg Perego ranges are. But will keep you posted.