Might have one, but it would be shipped from France.
24mm was not exclusive to Pugs if I remember right - mid/low end MBK had them too (amongst many others like Gitane). Kids bikes too. When tubing got a bit thinner they went to a whopping 25mm which is almost 1".
Keep a vernier caliper close with you and and an eye for street or tip finds or a visit to your local bike charity.
I have one, candle style and in pretty scuffed condition but I know myself how rare they are It'll polish up fine though. Steel, no rust. How does £20 posted in the UK sound? I can include a brand new saddle clamp too.