Dooku says Qui Gon in Episode II, so maybe you could have a close up of Qui gon, and have Dooku speak to him (through the force,) and then Obiwan could ask “I dont understand why he quit,” cluing in to the fact that Dooku is speaking to Qui Gon.
Its a bit of a cheat, but then, you would be able to use what is available without a ton of fuss.