Hmmm.
BuZZings sells one but I think it only goes to about 45mm.
Most pluming suppliers should have them for around $35. The one that goes to 45mm at Buzzings is $25.
How many cuts you doing? A hacksaw with a new orange blade, should make quick work of a dozen cuts, depends on how straight you can cut though.
Alternatively a cheap $20 angle grinder and a couple of aluminium cutting blades would also work well.
Pipe cutters can be a bit of a hassle. For 50mm Al pipe you would need to spin it around a dozen times each cut, slowly increasing the cutting blades pressure against the al. Go to quickly and you will crimp the wall.
Got any plumber mates that might carry one? I am suprised I can't help you out, I seem to have every other tool in the shed, if I had one it would be yours.
I'll check the pipe cutters when I get back to work in a hour. I'll let you know tonight if ours go to 50 mm, I'm pretty sure it only 45mm though.
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