I was kind of in the same boat. I picked up an old Kellet kit a while back. I had the plans, but no instruction manual. The manual, plans and video are still available from the company. Just give them a call and they'll sell you what you're looking for.

Absolutely nothing they sell is inexpensive (IMHO), but it seems to be good quality and they're good to work with as a company. If I remember correctly, I purchased a manual and video for about $50 shipped.