I went to the local metal supply and bought a piece of 1.5 mm sheet metal 30 cm by 120 something. Took the sheet to the closest sheet metal workshop and politely asked them to roll it into a cylinder for me. Took him about 2 minutes. Cost next to nothing!
Went home and cut excess off to get a 35 cm cylinder and welded the seam. Turned out just fine!
Next, fabbed a charcoal basket from some expanded metal scrap. Took a while but it turned out OK also.
Basket inside the SJ. Fits well!
Just needs a custom paint job and a thermometer. Posting pics when that's done!