Hello Mark,
send me a PM with your mail address and I can send you a pattern for DIY gaiters. I used a inner tube from a truck and cable straps. It is quite easy job.
BTW: I will be in Britain for week to show my Moggi her home. So the answer could take some time drive.

Keep mogging,

Christian

2006 4/4 70th anniversary, 1985 VW 1200 50th anniversary, 1977 Vespa 50 Special, 2003 Vespa PX 200E