I've gone similar as what @Vince linked with http://www.ebay.co.uk/itm/AMBROSIO-PRESTIGE-TRACK-CHAINSET-1-8-X-48T-X-165MM-SQUARE-TAPER-/391491217633?hash=item5b26b1e8e1%3Ag%3A2roAAOSweW5VZGa-&_trkparms=pageci%3D6c3aa1f5-4e9e-4185-9db1-a4c35d1d78d1%2Cparentrq%3Deb9fb1211560aa133242f4ebfffb8f39%2Ciid%3D1%2Cobjectid%3D109118 for my commuter.
I had budge Lasco cranks for years and never had any issues with them.
Ambrosio ones look identical so that's a good shout to get branded cranks
@Vince started
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I've gone similar as what @Vince linked with http://www.ebay.co.uk/itm/AMBROSIO-PRESTIGE-TRACK-CHAINSET-1-8-X-48T-X-165MM-SQUARE-TAPER-/391491217633?hash=item5b26b1e8e1%3Ag%3A2roAAOSweW5VZGa-&_trkparms=pageci%3D6c3aa1f5-4e9e-4185-9db1-a4c35d1d78d1%2Cparentrq%3Deb9fb1211560aa133242f4ebfffb8f39%2Ciid%3D1%2Cobjectid%3D109118 for my commuter.