SWTPC 8k Basic / Vintage Software Policy

Hello all, I have been watching this list for some time now and have enjoyed the enthusiasm with which people pursue the preservation of the classic machines. My personal project has been restoring a SWTPC 6800 to satisfy my nostalgic needs and I have gotten it up and running solidly. The next step for me in this quest is to locate a copy of the BASIC interpreter I used back then - SWTPC's 8k BASIC. I am willing to take it in any format (i.e. cassette tape, paper listing, disk file, paper tape, ...). Any help along these lines would be greatly appreciated. This brings me to a related second question. What is the consensus on copyright policy for vintage software. I am happy to pay for the software I acquire, but it's obviously more complicated with software written 20+ years ago. Any advice on this would be appreciated and I apologize if this topic has been covered before. Doug Peckham dpeckham(a)ucsd.edu