I've sorta exhausted my usual sources, so I hope someone on the forum might have a part I need. I've almost finished the restoration of my DL-1, but I'm missing a bolt. It's the bolt that holds the seat stay and the chain stay together (near the rear wheel) and screws into a nutsert. The chain guard is also held in place by this bolt. It is approximately 1/4 inch in size, but is an English threaded bolt. Neither SAE nor metric will work. I'm guessing it is Whitworth. I think the DL-1 might be the only Raleigh that uses this setup, as none of my donor bikes (Raleigh Sports) have the bolted-together rear frame. If anyone has one of these, I'd be very grateful and would gladly compensate your efforts. My email is luckychow99 at gmail dot com.