All aboard..

[grumpygrady]

for the siding you can make your own if you have a lathe
i used to make the dies for domed silver wire out of steel
but with thin alumium you could maybe use alumium round stock
anyway make a cylinder about two to three inches in diameter your choice
cut them both the same length IE i use some 2" stock and cut it four inches long and drill a hole clear though them both but with one hole smaller
now you need to draw up what the finished siding would look like from a end
IE ^^^^^^^^ but in your scale lol then chuck up one roller and make a positive
that is the one that has the raised bumps on it just go slow and check and recheck it
when its done do the other roller but i negative and this one is harder as it needs to be
as close as it can to fit
now make a frame and mount them so the top one adjusts up and down
put the rollers on axles and make the top one turn with a crank

i know i know it seems like a lot of work but if you just sit and think about it and you are handy it will click
or if you have a mill you can cut two plates and use a arbor press

sold and/or gave most of that stuff away when we moved down to Florida so i can't show pictures but will look on the inter-net

grumpy