Rob Armstrong doesn't have a website, but the Gordon Giltrap site hosts the Armstrong Owners Club. I'd love to know who got Swarb's guitar; Rob reckons it was one of his best. Rob also has a catalogue of past instruments, and it's best described as 'stringporn'; some really fab stuff in there, including doubleneck guitar/bouzouki etc. If you give him a call he may send you a catalogue, but the best thing to do is go and talk to him.
Tim from Bit on the Side
(Who owns a 1975 Armstrong 6/12 string doubleneck guitar and a 1986 Armstrong mandocello)