Buy a Shimano DX 16t sprocket.
Disassamble two old cassettes, use the spacers and the lockring to get a perfect chainline.
Use an old derailleur as singulator.
Use the screws to adjust the chainline.
Buy an Alivio cranckset (FCM410?) with taper axle (BBUN53).
Use only the middle chainring.
By doing so, you'll have to grind down the female part of te chainringbolts, or use rivets to make up for the space th outher ring normaly takes up.
I posted some pictures of a simular setup here.
Disassamble two old cassettes, use the spacers and the lockring to get a perfect chainline.
Use an old derailleur as singulator.
Use the screws to adjust the chainline.
Buy an Alivio cranckset (FCM410?) with taper axle (BBUN53).
Use only the middle chainring.
By doing so, you'll have to grind down the female part of te chainringbolts, or use rivets to make up for the space th outher ring normaly takes up.
I posted some pictures of a simular setup here.