Talk Morgan Forums Morgan Sports Cars Classic Morgans (pre-CX) Roadster rear suspension fail

After recently hearing a knocking from just behind the driver's seat on my Roadster Ser2, I removed the offside rear wheel to investigate. I appear to have suffered a sheared mounting bolt on the anti-tramp bar. There is a useful note on GoMog at https://www.gomog.com/allmorgan/roadsterantitrampissue.html and the photo looks the same as mine. So, not uncommon, but how and where do I source and replace the bolt ? I'm guessing I will have to remove the U-bolts to remove the block and tap (as in thread) out the remnants of the bolt where it appears to have sheared ? And it may just be the way it looks, but the bush seems to be internally threaded which can't be right ? This is the first time I have worked on the rear suspension, so in removing the U-bolts, is anything ghastly going to happen like the leaf springs exploding apart ? Help !