I know a lot of the classic old Ace kits are normally available as plans only. I'm afraid that hunting down old plans is not anything I'm familiar with, however.

Ace was kind enough to mention the original designers: Owen Kampen designed the Whizard and Tom Runge designed the Alpha. You might have some luck checking in with the AMA plans service or some of the other usual sources. With the kits selling for $39.99 however, you could build your first from the kit then scratch build subsequent planes down the road. With the price that plans are selling for these days, you probably won't get plans delivered for much less anyway.

Good luck and good shopping!