Ebay provided the 'tin' and starter. The former is 2 pieces 150MM square by
0.9mm thick, cost was around £4, I could have gone for mild steel but the
brushed stainless was cheaper! It's harder to work with though.
The pullstart is a pit/quad bike one, again I went for the cheapest
at a tad under £8.
OK, parts list,
2 -150x150x0.9mm steel,
4 - 100x6mm roofing bolts,
4 - 5mm nuts and bolts to fit pull starter,
1 - pullstarter.