Joined: Mar 2014
Posts: 18,248
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From: ,location, location
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
The tubes do exist couldn't point you towards them because we don't know what size you need. However you can always go to the shop you purchased the tires from and they will have the tubes or can get them if for some reason they don't carry tubes for the tires.
Yes sometimes running a smaller tube is fine but I would rather have the correct size. The only reason to run the wrong size tube is in an emergency situation or if you are running Tannus inserts.