Canal Cycling - a touchy subject

Interesting Guardian article (and comments) on the problem of inconsiderate cyclists on the Regent's canal towpath.

I can understand the concern; walking up the towpath the other week, I say a wheelchair user subjected to abuse from a pair of cyclists who seemed very aggrieved that he had the temerity to take up as much of the path as he did. (Sad to say, this is by no means the only example of anti-disabled prejudice I've seen from members of the outdoors-and-active fraternity.) And many parts just aren't good cycling territory, with narrow paths under bridges and little space to pass pedestrians. Born-again cycling proponent as I am, the RC towpath is one of those routes I really am not sure cyclists should be encouraged to use in its present state.

Extremely obsolete tech accessories required

Does anyone have any spare 7" diameter take-up reels for 1/4" audio tape? They would look something like this, and as the description suggests would be about 7 inches (18 cm) across and a quarter of an inch (6 mm) between the sides of the reel.

(Yes, I've extracted the old BSFA tape library and a reel-to-reel player from storage, but I can't seem to find the empty take-up reel I had. I do of course have about a hundred full reels, but I can't do much with them until I have an empty one to spool on to...)

EDIT Ah, found some. Four suspiciously light tape archive boxes proved to have spare reels in them. Crisis over!