> is there a MYOG article on your aluminium thing?
Sorry, but no. Too simple maybe? However ... herewith.
I misquoted the dimensions earlier: this is only 10" wide and less than 5" across. The gauge is something weird, but about 1 mm thick. It is a hard alloy, such as 7075. Weight is 70 g.
You can buy a piece of 7075 alloy 12" x 12" x 1.02 mm from OnLine metals:
for the princely sum of US$11.13 +P&P. It will make 2 scrapers.
Bending as shown to stiffen - ingenuity, or get a local sheet metal worker to guillotine and bend for you.
If you want to be really really exotic you could use 0.5 mm 6Al4V titanium sheet, but I am not convinced you need to. The 7075 alloy has lasted me for years.
I use the big side as a spade, and the short side as a scraper when making a tent platform. I can use the big side or the end as a knife to chop into very hard snow to create blocks. To make this tent platform with one of these would have taken Sue and me about 15 minutes:
Scrape & dig, stomp, scrape & dig, stomp, shave the surface smooth, pitch tent.